PEERLESS Boiler Manual L0308189

User Manual: PEERLESS PEERLESS Boiler Manual PEERLESS Boiler Owner's Manual, PEERLESS Boiler installation guides

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MI/MIH
Boilers

Installation,
Operation
Maintenance
Manual
Pr=-EI_LESS _
CAST

IRON

BOILERS

Model

Available

for

Natural

or LP

Gas

• Standit_g
Pilot (3 9 sectior_) with 8(7_ AFUE
• [-Ioneywell
SmartValve
® Intermittent
Ignition
with 82% AFUE

MIH Mid-E._f_ency
for Natural
Gas
• Honeywell

SmartValve

• Qualifies

for

Natural
Low

Utility

Draft

Sections

with

Rebates

83%

AFUE

in Some

Areas

Venting

with

Draft
Low

Diverter

Ceilings

Nipples

_ a Permar_ent
by

_Vct_'r

PetroIcum

Insulated

• Reduces

Ignition

Energy

to Vertical

Ir_stallations

• Unaffected
Deluxe

in 3-6

Design

Push

• Provici(

® Intermittent
Company

Horizontal
for

Steel

Available

(Chimney)

Profile

• Internal
• Ideal

Model

(3-9 section)

Oilier

Enameled

Boiler

• Completely

7"(c)hl Seed

alzd

Heat

Between

Sections

Contaminants

Steel

Jacket

Loss

Encloses

Gas

Valve

and

Burners

Safety
Controls
• Vent Safety
ShutoffSwitch
• Flame Rollout Safety
ShutoffSwitch

• Standing

Pilot

Intermittent

or Honeywell

• Honeywell
Operating
• Taco Circulator
• Elec.

Operated

• Grundfos

l_crless
in tttt_ ind_Lslr_/.
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[)(y(!ll({s._;

ivtlrranQj
_IL'_o

s I(_(__I_ I)oilt,rs.
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Peerless

All I_ (_rlt'ss

Ls p¢'ovlcl_'d.]_?r
provld(,s

tlt_' ('(t_%l ilOtl

IIIIlil('_l.

It'll

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of l)(t('rl_'._;:_
Ih¢"

C(l.'ql

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hot

N(!(?liolls

q['il.s

Ircldt,illark

Ivat_:r

Heater

['(,('rli,ss
Company

[ ](,_ll(,_

(2)m[J(lll{/

* 231

North

]OF Coltll)l(.lt,
Walnut

Street

it)(iFK(llll!j
* Boyertown.

o I llo¢letlw(tll

Corporcltion.

['_[_[_-r_kl_SS

Ix)liters

I'_Si(Jt_IIli_ll

l'_t _(, tz!I(1 It "_I _1_"(_r _"xt_"r_(1<'(1 t mt_rrczl iIi( ".s (ati l X ii f_ (11id I_ll)ol ar(_ _to_ v (_v(_ lied)& ".

co¢l._tdt

Damper

Relief
Valve
Floor Pan

i._ r_ rt,gislt_rt,d

rt'sid_'llti_ll

Vent

Circulator

q[f_,r on_ of tll_" mosl c:omprelt_.nsive
wctrrarlly
prof.jrarrus
c_¢_t iro,_ !_oil<.rs inc'!_d_, c_ lidl one tj_!(_r Illarl€_rlltj.
A limited.

r_'sidt't_ticd

Controls

Automatic

• 50 PSI Safety
• Non-Combustible
c_xStltartVah;_t

SmartValve

Ignition

CAST IRON BOILERS

it!]orlnaliorL
PA

19512

1021

* 610

367

2153

* www,peerless-heater.eom
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{3/02
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5M)
S A

USING THIS MANUAL
A. INSTALLATION SEQUENCE .............

1
1

B. SPECIAL ATTENTION BOXES ...........

START-UP

PROCEDURES

A. COMPLETING
B. CONTROL

DESCRIPTIONS

C. ADJUSTMENT
1.

PREINSTALLATION

A. ACCESSIBILITY CLEARANCES

..........

C. AIR FOR COMBUSTION AND
VENTILATION
.......................

D. LIQUEFIED PETROLEUM (LP) GAS
E. INSTALLATION SURVEY

REGULATOR

B. CLEARANCE FROM COMBUSTIBLE
CONSTRUCTION .....................

.......

...............

E PLANNING THE LAYOUT ...............

E CHECK-OUT

B. SAFETY RELIEF VALVE ................

C. PIPING FOR ZONED SYSTEMS

..........

D. EXPANSION TANK ....................

E. INDIRECT-FIRED WATER HEATER ........

E FREEZE PROTECTION

.................

.............

B. VENT DAMPER INSTALLATION GENERAL ..........................
C. VENT PIPING AND CHIMNEY

..........

D. BOILER REMOVAL FROM COMMON
VENTING SYSTEM ...................

A. WIRING

...........................

B. ZONED SYSTEM WIRING
C. CONTROLS

........................

D. SEQUENCE OF OPERATION

10
11
12

15
15

...........

INPUT

PROCEDURE

....

............
.............

TROUBLESHOOTING

24
24
25

A. SHUT-DOWN CAUSED BY PILOT OUTAGE,
BLOCKED VENT SHUT-OFF SWITCH OR
FLAME ROLL-OUT SAFETY SHUT-OFF
SWITCH ...........................
26
GUIDES ..........

A. GENERAL ..........................

B. DAILY (WITH BOILER IN USE) ..........

C. WEEKLY (WITH BOILER IN USE) ........

D. MONTHLY (WITH BOILER IN USE) .......

E. ANNUALLY (BEFORE START OF HEATING
SEASON) ..........................
30
_ _TINGS

15
.............

OF PILOT GAS FLOW

BURNER

10. BOILER DIMENSIONS
A. INTEGRAL DRAFT HOOD

.............

OF GAS PRESSURE

B. TROUBLESHOOTING

A. BOILER SUPPLY AND RETURN ..........

......

.......................

D. ADJUSTMENT
E. CHECKING

THE INSTALLATION

A. BASE/COMBUSTIBLE

FLOOR PAN .......

B. MANIFOLD/GAS TRAIN

...............

32
34

C. BLOCK/DRAFT HOOD ................
D. JACKET ...........................

36
38

E. CONTROLS/CIRCULATOR/VENT
DAMPER ..........................

Follow thetnsta[lattoninstructionspro',,'_ded ill this
manual m the order shown The order ot these
mstructLons has been set m order to provide the installer
with a logical sequence ol steps that wdl mulmllze
potenhal interferences and maximize safety, during
boiler mstallatLon

Throughout
thLs manual you will see speoal attenuon
boxes intended
to supplement
the mstmct=ons
and make
speoal
nohce of potenhal
hazards
These categories
mean
m the judgment of Peerless Heater Company

Indicates a condition or hazard which will cause
severe personal injury, death or major property
damage.

indicates a condition or hazard which may cause
severe personal injury, death or major property
damage.

Indmates a condition or hazard which will or can
cause minor personal injury or property damage.

indicates special attention is needed, but not directly
related to potential personal injury or property
damage.

1.!B

INS

Read carefully, study these msh-uchons before beginning
This bo,le_ must be installed by a quahfled
The bonler warranty

work

con_ac_or

can be voided _t the boder Is not installed, maintained

and serviced correctly

The equipment must be installed m accordance with those installation
requirements of the authority having
jurisdiction or, in the absence of such requirements, to the current edition of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54.
Where requtred by the authority having jurisdiction, the installation must conform to American Society of
Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers, ASME CSD-I.

r_*wr:_o,[o.]:[.."[.."]
I:] I ! / ik'd_a,]l :f;1 :_r_*l_[q _
Install boiler not less than 24" between the left slde. top,
and tront ot the boiler and adjacent wall or other
apphance, when access is reqmred for servicing

Do not install this boiler on carpeting. Boiler
installation on carpeting as a fire hazard. Install this
boder on non.combustible flooring or use a
combustible floor pan to install thts boder on other
non-carpeted flooring.

The design of ths boiler _scertffled for alcove mstallatlon
wlth the following clearances
I

6" between

24" between
construction

6" between

s,des and combustible

construction

top of jacket and combushble

Prowde adequate facflltnes for combustlon and
vent]lahon a_r un accordance w_th Sechon 5 3. ALrfor
Combustion and Ventilation Nanonal Fuel Gas
Code ANSI -7223 1/NFPA 54, or apphcable
prows_ons of the local budding code Subsechons 2
through 6 below are based on National Fuel Gas
Code ANSI Z223 1!NFPA 54 requnrements

draft hood and combustible

COl_ls_uctlon

6" between

10" between
consiluctlon

vent pipe and combustLble construction
rear of ]acket and combushble
2

DehnltlOnS

Do not install this boiler on combusttble flooring
unless it is installed on a special combustible floor
pan provided by Peerless Heater Company. Boiler
installation
on combustible flooring without the
special pan is a fire hazard.

Unconfined Space: a space whose volume us not
less than fifty (50) cubnc feet per 1000 Btu/hr of the
total input rahng of all apphances installed Jnthat
space Rooms commumeatmg dnrectly w_th the space
m which the apphances are installed, through
opemngs not furmshed w_th doors, are considered
part of the unconfined space

To order combustible floor pan, use the 5-digit stock
codes listed in Section 11A of this manual.

Unusually
where

Tight Construction:

Constmchon

Walls and cenlmgs exposed to the outsMe
atmosphere have a continuous water vapor
retarder wlth a rating of i perm or less wLth
openings gasketed or sealed, and
b

Weatherstnppmg
has been added on openable
windows and doors, and
CaulkLng or sealants are supphed to areas such
as joints around window and door frames.
between sole plates and floors, between wallceflmg joints, between wall panels, at
penetratlons for plumbing, electrical and gas
hnes, and at other openings

Appliances
Located in Unconfined
Spaces:
For installations in unconfined spaces with other
than unusually tight construction, the supply of air
for combustion and ventilation can usually be
considered adequate.

Unusually Tight Construction:
For equipment located in buildings of unusually tight
construction as defined on the previous page,
provide air for combustion and ventilation using the
methods described in 5a or 5b below.

Appliances

Located

in Confined

?
12" max

TWO AIR OPENINGS:
Minimum
Free Area Each 1 in2per 1000 Btuh
at Least 100 in2

Spaces:

a. All air from inside the building: Provide two
permanent openings communicating directly with
an additional room or rooms of sufficient volume
so that the combined volume of all spaces meets
the criteria for an unconfined space. Use the total
input of all gas utilization equipment installed in
the combined space in making this
determination.

12" max

I
Figure

Size each opening with a minimum free area of
one square inch per 1000 Btu/hr. of the total
rating of all gas utilization equipment in the
confined space, but not less than I00 square
inches. Begin with one opening 12 inches from
the top, and begin the other opening within 12
inches of the bottom of the enclosure. See Figure
1. Provide air openings with minimum
dimensions not less than three (3) inches.
b.

BUILDING
Must communicate
freely
with outdoors
Must not be under
negativepressure

Air Openings

- All Air from

Indoors

TWO AIR OPENINGS:
Minimum
Free Area Each 1 in_per 4000 Btuh

All air from outside the building. Connect the
confined space with the outdoors in accordance
with methods i) or ii) below. Provide air openings
with minimum dimensions not less than three (3)
inches. Where ducts are used, make certain that
they are the same cross-sectional area as the free
area of the openings to which they connect.
Provide two permanent openings, one
commencing within 12 inches of the top and
one commencing within 12 inches of the
bottom of the enclosure. Connect the
openings directly or by duets, with the
outdoors or spaces (crawl or attic) that freely
communicate with the outdoors.

Figure 2:

Air Openings
Outdoors

- All Air Directly

Figure

Air Openings - All Air from
through Vertical Ducts

from

Where directly communicating
with the
outdoors (see Figure 2) or where
communicating to the outdoors through
vertical ducts (see Figure 3), size each
opening with a minimum free area of one (I)
square inch per 4000 Btu/hr. of total rating of
all equipment in the enclosure.

Outdoors

Where

communicating

ii-i

with the outdoors

through
horizontal
ducts, size each opening
with a minimum
free area of one (1) square
inch per 2000 Btu/hr of total input rating of
all equipment
in the enclosure. See Figure 4.

12"maxl
[ i
,
_t [jT
)

TWO AIR OPENINGS:
1'

Minimum
Free Area Each =
in _per 2000 Btuh

ii) Where the equipment has clearances of at
least one (1) inch from the sides and back
and six (6) inches from the front of the
appliance, the code allows one permanent
opening, commencing within 12 inches of
the top of the enclosure. Connect the
opening directly with the outdoors or through
a vertical or horizontal duct to the outdoors
or spaces (crawl or attic) that freely
communicate with the outdoors. Size the
opening with a minimum free area of one
square inch per 3000 Btu!hr. of the total
input rating of all equipment in the enclosure,
and not less than the sum of the areas of all
vent connectors in the confined space.
6.

In calculating free area of an opening, take into
account the blocking affect of louvers, grilles and
screens. Do not use screens smaller than i/4" mesh.
If the free area is known, use this value in calculating
the size of the opening required. If it is not known,
assume that wood louvers provide 20-25% free area,
and metal louvers and grilles provide 60-75% free
area.
Remove sources of hydrocarbons (bleaches,
cleaners, chemicals, sprays, paint removers, fabric
softeners, etc.) from the boiler area. The vapors
generated by these substances can contaminate the
combustion air and contribute to shortened
boiler/vent system life.

1-|
l
!

min

?
12" max

Figure 4:

Air Openings - All Air from Outdoors
through Horizontal
Ducts

IIL_l_uf±lUHff±_ugl[e]L_l
[_'q_|J;kVJ_k
For new and existing installations, a Water Installation
Survey is available from Peerless Heater Company. The
survey will provide information on how a hot water
boiler works with your specific system and will provide
an overview of hot water system operation in general.
You can also use this survey to locate system problems
which will have to be corrected. To obtain copies of the
Water Installation Survey, contact your Peerless
representative.
I_ff±!_l_ll_[dl|ll:lt_VLelll

Prepare sketches and notes of the layout to minimize the
possibility of interferences with new or existing
equipment, piping, venting and wiring.
Liquefied Petroleum (LP) is heavier than air and may
collect or "pool" in a low area in the event of a leak
from defective equipment.This
gas may then ignite,
resulting in a fire or explosion. See the instructions
below.

I IJ

! [o|lJ :l ;i I :ll]'.J

:Eld :{o] ! ::[IILVA
|_[€-r_,_..

The following LP requirements from the Uniform
Mechanical Code, section 304.6, may be in effect in
your geographic area:
"Liquefied peh'oleum gas-burning appliances shall
not be installed in a pit, basement or similar location
where heavier-than-air gas might collect. Appliances
so fueled shall not be installed in an above-grade
under-floor space or basement unless such location
is provided with an approved means for removal of
unburned gas."

l_.]llF'4T_'i:i_IrJ_

Provide

a sound,

level foundahon

Locate

boiler

near to the chmney
or outside v_ali as possLble
cennahzed
v_Jth respect to the heahng
system

Locate
_movll_g

boiler

[n front

of installation

pos[hon

before

crate

If using combushble floor pan, poslhon pan on
foundat,on or flooring

Separate the wood shppmg pallet from the boiler
base by removing two (2) hold-down bolts at each
end of the boder base

Move boder into hnal poslhon If using combustLble
floor pan, install boder on pan as outhned ,n the
instructions included wlth the pan

and

3. WATER PIPING AND CONTROLS
"-I

[:{=]ll_;l[.-llJ'J_Jl_'m_,]l_ll]

I;l:i[IJ;|k'

Size the supply and return to suit the system. A
t_pical piping arrangement
is shown in Figure 5.
Refer also to the I-B-R
Installation Guide No. 200
and the Peerless Water Survey for additional
guidance during water piping installation.
Return Piping:
a. For boilers equipped with a factory mounted
circulator, pipe the return to the inlet connection
of the circulator.
b.

For boilers equipped with a separate, unmounted
circulator, pipe the outlet connection of the
circulator to a tee, provided with a drain valve, at
the 1-1/4 NPT return tapping near the bottom of
the left section. Pipe the return to the inlet
connection of the circulator.

Supply

Piping:

Pipe the supply to the I i/2 NPT supply
the top and rear of the boiler.

tapping

When system return water temperature will be below
130°E pipe the boiler with a bypass arrangement to
blend the system return and hot supply to obtain at
least 130°F entering the boiler. For more information
on bypass piping, consult the Peerless Water Survey.

If desired, install the circulator in the alternate
location shown in Figure 5. Consult the Peerless
Water Survey for more information on circulator
location.

COLD
WATER
FILL

VAL VE

TO
DRAIN

i
DRAIN
VAI VE J

,7
Figure

Supply

and

Return

Piping

Install this boiler so that the gas
components
are protected
from
spraying,
etc ) during appliance
service (circulator
replacement,
control replacements,
etc )
If this boiler and
conjunction
with
chilled medium
the proper valve

HECj

VAILVEI

SUPPLY

LINE

distribution
system is used in
a refrigeration
system, pipe the
in parallel with the boiler and install
to prevent the chilled medium
from

entering
the boiler. A drawing
up is provided
in Figure 6

ignition system
water (dripping,
operation
and
condensate
trap,

illustrating

this hook-

When the boiler is connected to heating coils located
in air handling units where they may be exposed to
refrigerated air circulation, install flow control valves
or other automatic means to prevent gravity
circulation of the boiler water during the cooling
cycle.
If this boiler is installed above radiation level,
provide a low water cutoff device, either as a part of
the boiler or at the time of boiler installation.

LINE

WATER
_HILLER

THREE
VALVE

Figure 6:

Parallel

Hook-up

with

Water

WAY

Chiller

SAFETY
RELIEF
VALVE

I:m l-'f!1=:lL'd
I;t=l!l=l:l krl±lLvd
i I Locate safety relief valve and fittings in bag
assembly.

x6"
NIPPLE

2. If air elimination is not required at the safety relief
valve tapping, install valve and piping as shown in
Figure 7.
3. For air elimination at the safety relief valve tapping,
install valve and piping as shown in Figure 8.

Pipe the discharge of safety relief valve to prevent
injury in the event of pressure relief, Pipe the
discharge to a drain. Provide piping that is the same
size as the safety relief valve outlet.
Figure

Safety Relief Valve Hook-Up Installation
with Air Elimination
in System Piping

AIR

ELIMINATION
DE_CE

SUPPLY
SAFETY
RELIEF
VALVE

TEE
X 6_
NIPPLE

NIPPLE

DRAIN

5/4" STREET
ELBO_

Figure 8:

Safety Relief Valve
Air Elimination

Hook-Up

with

loll I'JI_IL'_[_ l;:[e];l v_[o]L'ql:lm]F.._'_"-]Ii :hVj_
1.

See Figures

9 and

10 for basic

Run each zone pipe down then up to zone
prevent air accumulation
in piping

If required,
provide
zone separately,

means

zoned

system

to isolate

layouts.
to

and drain

each

FROM

TO SYSTEM
ZONE
5

ZONE
2

ZONE
I

ZONE
/

SYSTEbl
ZONE
2

I
I

ZONE
VALVES

ZONE
3

BAL _,NCINO
VAi VES
m',

TO
SUPPLY

Figure

Zone Piping with

CONNECT
TO
RETURN
(CIRCULATOR

INLET)

Zone Valves

TO SYSTEM
ZONE
5

FLOW
CONTROL

ZONE
2

I-

FROM
ZONE
1

ZONE
1

ZONE
CIRCULATORS

VALVES

CONNECT
TO
SUPPLY

Figure

10: Zone Piping with

Circulators

CONNECT
TO
RETURN
TAPPING

SYSTEM
ZONE
2

I_
1.

Consult

the tank

manufacturer's

instructions

I:l;f:l:_,l:

For new or existing systems that must be freezeprotected:

for

specific information
relating to tank installation
Size
the expansion
tank for the required
system volume
and capacity.
See Table 8 in Section
10 for boiler
water capacity.

Use only inhibited propylene glycol solutions of up to
50% by volume with water. Ethylene glycol is toxic
and can attack gaskets and seals used in hydronic
systems.

Expansion tanks are available with built-in fill valves
and check valves for reducing supply water pressure
and maintaining minimum system pressure. Check
the design features of the tank and provide valves as

necessary.

Refer back to Figure 5 for typical expansion

I;J;{e]i:_l,]i[o]_

Glycol in hydronic applications is specially
formulated for this purpose. It includes inhibitors
which prevent the glycol from attacking metallic
system components. Make certain that the system
fluid is checked for the correct glycol concentration
and inhibitor level.

The anitfreeze solution should be tested at least once
a year and as recommended by the antifreeze
manufacturer.

Antifreeze solutions expand
example, a 50% by volume
in volume for a temperature
180°F, while water expands
temperature rise. Allowance
expansion in system design.

For more information, consult the Peerless Water
Installation Survey and the antifreeze manufacturer.

tank piping.

I::m I I£qm]I:| =[o,]iI_ :ll:t ::1e]I_l,__ii =1;t I: I_,__ii ::1
If the boiler is to be used in conjunction with an indirectfired water heater, refer to Figure 11 for typical piping.
Follow the instructions provided by the water heater
manufacturer. Pipe the water heater as a separate zone.

more than water. For
solution expands 4.8%
increase from 32°F to
3% with the same
must be made for this

SUPPLY
TO
SYSTEM
ZONE

VALVES

RETURN FROM
SYSTEM

]
BALANCING
VALVE

INDIRECT
FIRED
WATER HEATER
HOT

DOMESTIC
WATER
SUPPLY

SUPPLY

TO
TANK

I
SYSTEM

CIRCULATOR

DRAIN

COLD
DOMESTIC
_WATER SUPPLY

Figure

1 1: Typical

Piping

BALANCING
VALVE

with

Indirect-Fired

Water

Heater

Lt/:1_/Jl_[,':t

4; VENTING
|_,!1

h,'_ii::[d;
1.

f_,_ II o] ;f_,_;Iil

-"[o_o] g

The MIiMIH boiler is equipped with a built in draft
hood This device is designed to:
a

provide for the ready escape of flue gases from
the boiler in the event of no draft.

prevent

Do not use one vent damper to control two or more
heating appliances. See Figure 12.

Follow these and the installation instructions that are
included with the vent damper. Observe the cautions
and warnings that accompany all instructions.

Make certain that minimum clearances provided in
the vent damper manufacturer's instructions are
maintained and that adequate space is available for
damper access and service.

Orient the damper operator to facilitate connection
of the harness with the vent damper and boiler. Note
flue gas flow arrow on vent damper and orient as
required. For installation with damper mounted in
vertical position, see Figure 13. For installation with
damper mounted in horizontal position, mount the
unit as shown in Figure 14 to avoid excessive heat
on the operator or condensation drips into the
operator.

a backdraft [Tom entering the boilen

c. control stack draft during operation.
These tasks are accomplished without the extra
height requirements of a separate draft hood.
2.

The draft hood relief opening is the large rectangular
passage at the front of the boiler. Make certain that
there are no obstructions to airflow in front of this
opening.

A vent safety shut off switch is located within the
draft relief opening to shut off the boiler in case of a
blocked vent condition. See Section 7B for details
regarding this device. See Figure 16 in Section 6
(Electrical) for spill switch location.

The vent damper can be mounted directly onto the
round draft hood outlet (vent connector) on top of
the boiler, or in vent piping close to the boiler. See
the Vent Damper Installation Instructions below.

BOILER

INCORRECT

Figure

12: Venting

Multiple

Appliances

c:::::::_

c:::=_

c:::::_

c:::::::_

OTHER
HEATING
&PPLIANCE

CORRECT

_o,,NkVJ:h,_/ uI:J I:,,]h,1[€_V_*l_._
I D][o,]-"I hVjh._I_"
1.

Install vent piping in accordance with Part 7. Venting
of Equipment, National Fuel Gas Code, ANSI
Z223. I/NFPA 54 or applicable provisions of the local
building codes.
Inspect the existing chimney and lining for structural
soundness, corrosion and perforations. Repair as

Before connection of joints, inspect the vent pipe
interior for foreign objects such as tools, equipment,
rags, etc. and remove if present.

Insert vent pipe into but not beyond the inside wall
of the chimney flue.

Do not connect vent connectors serving appliances
vented by natural draft into any portion of
mechanical draft systems operating under positive

neces_Fy.

pressure.

Install vent pipe to slope upward at least I/4" per
lineal foot between the draft hood outlet and the
chimney.

Support horizontal portions of the venting system to
prevent sagging by use of metal strapping or
equivalent means. Locate supports at no more than
four (4) foot intervals.

flVENT
TO
CHIMNEY

SLOPE uP
A MINIMUM
OF 1/4"
PER FOOT
VENT
DAMP

DRAFT
HOOD
RELIEF

_ _

SUPPORT
AS REQUIRED,

f¢3

DRAFT

HOOD

OUTLET

Figure

13: Venting

with

Vent Damper

SLOPE UP
A MINIMUM
OF I/4"

VENT
DAMPER

in Vertical

Position

_VENT TO
CHIMNEY

11 O'CLOCK
POSITION

PER FOOT_,,_

i O'CLOCK
POSITION

HEAT
SUPPORT
REQUIRED

AS
_CONDENSATION
ZONE

r i
7 O'CLOCK
POSITION

DO NOT
OPERATOR

MOUNT DAMPER
IN SHADED
REGION

SECTION

Figure

14: Venting

with

Vent

Damper

in Horizontal

O'CLOCK
POSIT'ON

Position

At the time of removal of an existing boiler, follow these
steps with each appliance remaining connected to the
common venting system placed in operation, while the
other appliances remaining connected to the common
venting system are not in operation:
a. Seal any unused
system.
b,

openings

in the common

Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.

Test for spillage at the draft hood relief opening after
5 minutes of main burner operation. Use the flame
of a match or candle, or smoke from a cigarette,
cigar, or pipe,
After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers and
any other gas-burning appliance to their previous
conditions of use.

venting

Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion and other
deficiencies which could cause an unsafe condition.
Insofar as is practical, close all building doors and
windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on any clothes dryers and any
appliance not connected to common venting system.
Turn on any exhaust fans, such as range hoods and
bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan. Close
fireplace dampers.

Any improper operation of the common venting
system should be corrected so that the installation
conforms with the current edition of the National
Fuel Gas Code, ANSI 7-223.1/NFPA 54. When
resizing any portion of the common venting system,
the common venting system should be resized to
approach minimum size as determined using the
appropriate tables located in the chapter "Sizing of
Category I Venting Systems," in the current edition of
the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

SLZeand w,-_tal[the gas supply plpmg properly in
ordeT to provide a supply of gas sufflc,ent to meet
the maximum demand wlthout undue loss of
pressure between the meter and the boder
2

Determine the volume of gas to be provlded to the
boller in cublc feet per hour To obtain this value,
thv]de the Btu per hour rating (on the boiler rating
plate) by the heating value ot the gas ]n Btu per
cubic feet Obtain the heating value of the gas from
the gas suppher As an alternatwe use Table 1 2 or
3 on the next page to obtain the volume of gas to be
p_ovLded to the boder
Use the value obtained above as the bas_s for p_pmg
SLZmg SLze the gas piping m accordance w_th Table
4 Consult the Natzonal Fuel Gas Code ANSI
Z223 I,'NFPA 54 for other slzlng optmns

Locate the drop pipe adjacent
the boder

Install a sedlment trap See Figure 15 Locate a tee
m the drop plpe at same elevatlon as the gas inlet
connechon to the bo_Ler Extend the drop p_pe to a
pLpe cap

to, but not m front of

Install a ground joint umon ahead of the gas control
assembly to permit serwcmg of the control Some
Local codes reqmre an additional serwce valve when
using the combmat,on gas controls If your code
reqmres such a valve a suggested IocatLon Lsshown
in FLgure 15

Use a pipe joint sealing compound that is resistant to
the action of tiquefied petroleum gas. A non-resistant
compound may lose sealing ability in the presence of
this gas, resulting in a gas leak and fire or explosion
potential.
Check pLpmg for leaks
Use an approved gas detector, a non-corroslve leak
detectlon flu,d or other leak detecUon method If
leaks are found turn off all gas flow and repalr as

SERVICE

-----JAC K ET

_GJ. UNION
_

_fSEDIMENT
_/FLOOR

Figure

15: Gas Connection

TRAP
LINE

to Boiler

Disconnect the boiler and its ]ndlwdual shut-off valve
from the gas supply piping system dunng any
pressure testLng of that system at test pressure m
excess of i '2 psLg (3 5 kPa)

Do not subject the gas valve to more than 1/2 psi
pressure. Doing so may damage the valve.
Isolate the boiler from the gas supply p_pmg system
by closing _ts _ndw_dual serwce valve dunng any
pressure testing of the gas supply plpmg system at
test pressure equal to or less than i 2 pslg (3 5 kPa)
9

Mlmmum permlsslble supply pressule for purposes
,nput adjustment (Inches Water Column)
MI-09 Standing Pdot Natural Gas
5 2"
All other MI/MIH Natural Gas
5 0"
All MI LPGas
II 0"

Maximum permlsslble supply pressure to the boder
(Inches Water Column)
All MI/MIH Natural Gas
13 5"
All MI LP Gas
13 5"

necessal_j

When checking for leaks, do not use matches,
candles, open flames or other methods that provide a
source of =gnition.This
can ignite a gas leak,
resulting in fire or explosion.

[tl :I-2 [_igl_tl

Table

Boiler-

Natural

Model

Gas

Input
(Cubic F_Hr)

MI 03
MI-04
MI-05
MI Ofi
MI 07
M] 0_
MI 09
Based on i000

Table

70
105
140
175
195
227 5
260

Btu/Cubic

Boiler

- LP Gas

Model

Input
(Cubic FI/Hr)

Ml-03
MI 04
MI-05
MI-06
MI-07
M[ 08
MI-09

28
42
56
70
78
91
104

Based on 2500 Bt_ICubicFt

Table

MIH

Boiler

- Natural

Gas

Model

Input
(Cubic FffHr)

MIH-03
MIH-04
MIH 05
MIH 06

65
97.5
130
162.5

Based on 1000Btu/CubicFt,

Table 4:

Pipe Capacity

Capacity of pipe of different diameters and lengths in cu. ft. per
hour with pressure drop of 0.3 in and specific gravity of 0.60.
No allowance for an ordinary number of fi_ings is required.
Pipe
Length
Feet

V4"

11/4"

11/2u

Pipe

I0
20
30
40

278
190
152
130

520
350
285
245

1,050
730
590
500

1,600
1,100
890
760

50
60

115
105

215
195

440
400

670
610

Multipliers to be used with the above table when the
specific gravity of the gas is other than 060:
Specific Gravity
Multiplier ........

. 0 5
110

055
1,04

0.60
1.00

065
0.962

070
0.926

6.*ELECTRICAL
Install

all elechlcal

wrong

m accoldance

wLth the National

Elecmcal

Code

and

local requirements

This umt when installed must be electrically grounded in accordance with the requirements of the authority
having JUrlSdtctton or, in the absence of such requirements, with the current edlbon of the National Electrical
Code, ANSI/NFPA 70.

r_,! iv=,il;llL_[€

_.41 [*(o] L_iiII-'{e]I_

See Figure 16 for locatEon of wrong and conh'ols
Use Figures 17 and 18 to connect the boder to a
power supply and to connect components to the
boiler

2 Connect

the bo=le_ by a separate, permanently
electrLcal supply hne with a fused switch

Connect _he vent damper harness to the polarLzed
connector Lnthe boder vest=bule as shown m
Figure 16

Adjust

heat

antlcipator

For proper locatlon of controls and accessories refer
to Flgure 16 and Section I i

See the attached control sheets for specific details
regarding the instal]atlon of the various conlzols

Thin boiler is supphed wlth safety dev=ces m addttlon
to the hmlt For a descnpt_on of these dewces and
how they work to ensure the safe operatlon of the
boiler, see Secuon 7B

If the clrculator [s mounted m the supply plpmg,
provLde longer wrong harness as requLred

live

the thermostat

to 0 2 Amp

See Figure 20 for typLcal wiring w=th zone valves See
Figure 21 for t_pLcal wrong with zone cLrculators When
wLrlng a zoned heating system, follow all apphcable
codes ordinances and regulations

Do not power zone
limit. Doing so will
transformer Use a
handle the total of

valves directly from the boiler
greatly reduce the life of the
separate transformer sized to
all zone valve electrical loads

LIHL

OL IACE

TO ','EN7

DAMPEP

T,:, THEPrlOST_T _

Lit IIT

C, Jr

I-L_IPE_

F _,r Jr JEC

E JlLC_

T,)_'

-_._

"---...

GLC,CXED

16: Wiring,

POL'I:t2ED

P_ /IBLILE,

Controls

SWITCH

i IPI3BDL

DB_E_.','
LeL_t

Figure

_Er_T

and Safety

nbr4

CO_L_

_JCILLOU T

Devices

CONNECTION

DIAGRAM

LADDER
24V

THERMOSTAT

....

LB148£

OIAGRAM
115/60/i
pOV_ER
SUPPLy

(BY OTHERS)
C_81NATIO_i

r.....

NSTALLF_

_ 60
R

SUPgLY

eK_

DISCONNECT

FUSE{)
DISCONNECT

SER_CE

S_TCH

S_4TCH

RI
pR_MAR Y

SER_C£

TR ANS_Oei4 ER

THESE]_TO-

SZCONDARY

0{,.
!B.i l
L2T22_

,
I

CONNECTOR

B2,

I
i

I
rifle

RelJ_e,4JT

_ERMO¢OUpI "_
F _=t__

S_l

PRS

L
RZ
C_NEC1]ON
---

UNE
UNE
--

-- --

VOLTAGE
VOLTAGE

DIAGRAM

LEG{.ND

_IZE
_ZE

_¢ A_
16-18

LOW '_LTAGE

SIZE

18 A_G

LOW

SIZE 16-18

VOLTAGE

w
0
BL

TYPE TW, TFF'N OR
AWG TYPE I%V TFFN

WR[

TYPE

1EW/A_
_IRE
OR I_W/A_%a V_RE

TEW/AV_,

TFFN

LAODER

_R£

120v

120V

24V
--

2) IF ANY OF
REPLACED,

Figure

I'_

17: Wiring

F.']:[olli:l_[o,]:l
I.

Standing

MUST

COMPLY

V_IH APPUANC[

1HE ORIGINAL MRE
AS
IT MUST
B_ REPLACED

CODES,

ORDINANCES

AND

SUpPU_O
_4TH THE ApPLiANCE
V4T_ _RE
AS SHO_

and Connection

Diagram

REGULATIONS

MUST

----

Pilot (See Figure 17 above)

• the vent damper operator through contact R2,
provided that the high-limit switch is
closed.
The vent damper
b.

operator

• the pilot thermocouple is proving flame
• the blocked vent switch is closed, and
• the flame rollout switch is closed.

EXTERNAL

_IRtNG

[

INI_RNAL

_,tRING

[XERNAL

_IRINg

_RING

_RMtNAL

Ignition)

When the call for heat ends:
• Limit relay R de-energizes,
contacts RI and R2.

which opens

• The circulator shuts down.

opens the damper.

Once the damper is proven open, the gas valve
energizes, provided that all of the following
conditions are met:

IVOLT

T_ERNOCOUP_

I
WIRIN_

Pilot flame is monitored through the pilot
thermocouple.
If pilot flame is lost during a call
for heat, main and pilot gas flow will be shut off.
The valve must then be manually reset by
following the Lighting Instructions mounted on
the jacket panel and included in Section 7 of this
manual.

a. The vent damper is continuously powered. On a
call for heat, limit relay R is energized, which
energizes:
contact

I[G_NO

INTERNAL

L_I4BE

Pilot (Continuous

[o]d[oir,,l=l;__41/[o]_

• the circulator (when used) through
R1, and

24V
MIU

-Standing

DIACRAM

NOTESm
I) ALL _RING

1%.

V#_lTE
ORANCE
BLUE

TYPE TC CABLE
AWG

LIMIT

BvS

• The gas valve de-energizes.
• The vent damper
d.

closes.

If temperature exceeds limit setting, main burners
shut off and circulator continues to operate.

i:! ! ;["_e_2_

CONN£CTI_

DIAGR_

L*_[R

[_AGRAM

L 1

11p_o_45_LR_
1

¢1
FUSED
D'S_EC

RI
T

_5_ T_I_

....

HIGH
U_IIT R

LAD{)_R DIAGRAM L[G[NO

[

1_+41T_

__AM_

ND I

120V

---

.......

and Connection

Diagram

- Intermittent

Intermittent Ignition (see Figure 18 above)
a. The vent damper is continuously powered. On a
call for heat, limit relay R is energized, which
energizes:

• the circulator (when used) through contact
RI, and
• the vent damper operator through contact R2,
provided that the high-limit aqu_stat switch is
closed.
The

damper

operator

opens

the vent damper.

Once the damper is proven open, the ignition
circuit within the gas valve energizes, provided
that all of the following conditions are met:

_4V

iN.HAL

24V

[XTERNAL

_>iLOT

18: Wiring

I_IR1NG

t20v [XT_RHAL_RIN_

----

Figure

INT_RN_L

LO14_

_P
PILOT

_BNC)]

_4RIN_
_I_IN_

_RIN@

T_R_IN_-

Ignition

• the blocked vent switch is closed, and
• the flame rollout switch is closed.
c. When the call for heat ends:
• Limit relay R de-energizes,
contacts R1 and R2.

which opens

• The circulator shuts down.
• The gas valve de-energizes.
• The veat damper

closes.

d. If temperature exceeds limit setting, main burners
shut off and circulator continues to operate.

START
APPLY24
TO
APPLIANCE
VAC

I THERMOSTAT
CALLS FOR HEAT

I
FIVE-MINUTEDELAY
RETRY
A

FLAME
SIGNALNO
DETECTED_

I INTERNAL
TRIAL
FOR
IGNITION

• WAIT FOR FLAME SIGNAL
TO DISAPPEAR
• PILOT VALVE/IGNITER
REMAIN OFF

CHECK OKAY? I NO
_YES

POWERED
I • IGNITER
PILOT VALVE
OPENS

PILOTLIGHTSAND

[

FLAME

IS SENSED
DURING
/_-_
TRIAL
FOR IGNITION?

THREE-SECOND
FAILURE
RECYCLEFLAME
DELAY J

• PILOT VALVE CLOSES
• IGNITER OFF

YES
MAIN
BURNER
OPERATION

[ •" IGNITER
MAIN VALVE
OFF OPENS

I
I

• MAIN AND PILOT VALVES CLOSE

FLAME SIGNAL LOST?

I HEAT
THERMOSTATCALL
ENDS

FOR

FLAME LOST MORE THAN
FIVE TIMES IN ONE
CALL FOR HEAT?

I • MAIN AND PILOT VALVES CLOSE
END
L/_

Figure

19:

IGNITER WILL TURN OFF ABOUT 30 SECONDS INTO THE TRIAL FOR IGNITION.
IF THE PILOT FLAME HAS NOT LIT, IT WILL TURN BACK ON FOR THE FINAL
30 SECONDS OF THE 90 SECOND TRIAL FOR IGNITION. THE PILOT VALVE
WILL BE ENERGIZED DURING THE ENTIRE TRIAL FOR IGNmON. THIS IS
NORMAL OPERATION FOR THIS GAS IGNITION SYSTEM.

Intermittent

Ignition

System

Operating

Sequence

I
I

NI NO

I15V/60HZ

_LI

TO MAIN
DISCONNECT

g_TCH

(HOT}
_2

ZONE I

ZONE 2

ZONE 3

GND
,

_×

I
[

[

F
I
I

I
'

_c×

I
I

•

F
!
[

AOOASTAT

dUMPER
FACTORY
INSTALLED--

I
7
v

I
I

q
L

_
y

7
71
y]

,
I

RELAY
(HONEYWELL
LS148E)

1
1 _
l

[
ZONE ,
VALVE

ZONE 2
VALVE

ZONE
3
VALVE

NO_
_

AlL WIRING MUST
AND PEGULATIONS

COMPLY

WITH APPLICABLE

WIRE REMAINDER
OF AQUASTAT
RELAY
SYSTEM
WIRING DIAGRAM SUPPLIED

CODEg•

OROLNANCES

IN ACCORDANC_

WITH

kkGX.N_
UN_

VOLTAGE

LOW VOLTAGE

Figure

20: Zone Wiring

I20V/6OHZ

with

Zone Valves

_LI

(_OT)--

TO MAIN
DISCONNECT

SWITCH

_GND
ZONE

THERMOSTAT
_
24V

ZONE

ZON[
3
IHERMOSTAI
24V

THER_OvSTAT

JUMPER
FACTORy
i

INSTALLED

[NSTALLE O

(HONEYWELL
LIMI T
LBI48E)

1I
ZONE 2
CIRCULATOR

BOILER
CIRCULATOR
(ZONE I)

(_)

Figure

ALL ',_RING MUST
AND REGULATIONS
_RE
REMAINDER
SYSTEM
_R_NC

ZON£

CIRCULATO_
L

.............

I
•

L .........

COMPLY

'_TH

APPLICABLE

CODES,

ORDINANCES

LINE

VOLTAGE

LOW VOLTAGE

OF LIMIT IN ACCORDANCE
DIAGRAM
SUPPLIED

21: Zone Wiring

I
i
i
L

S_TCHING
RELAY

S_ICHING
RELAY

with

_TN

Circulators

7. START-UP PRO_GI RES +
Connect a manometer to the gas val_,e on the valve
outlet (ga, manifold) Use the 1 8 NPT tappLng
prowded

f-'l [a"[o) L'+I"JII:IIIIh'_[€"li l -"I=IIh';F-"+l
Ir-"1! l;_li to] L_
1

Cont£rm that all water gas and electnclly are
turned off

Inspect the boiler combu,,t]on chamber
objects and remove if present

Check phystcal cond]tton of burners and pilot Make
certain that there are no unusual bends or
perforations m the burners or pilot Replace
components if necessary

Verify that water pLpmg venting
electrical wlrLng and components
properly
Refer back to prevtou+
mstructtons
as well as egutpmen[
mstruchons
as necessary

for foreLgn

gas ptpmg and
are mstalled
sections of these
manufacturer's

Confirm that the gas supply pressure to the boiler Rs
above the mlmmum and below the maximum values
for the gas being used See the end of Section 5 for
these values If a supply pressure check _s reqmred
_solare the boiler and gas valve before performing
the pressure check If the supply pressure is too high
or too low contact the gas supplier

i0 Turn on electrtctw

and gas to boiler

11 Light the boiler by followmg the Llghnng Operating
Instrucnons label mounted to the jacket panel The
Lnltlal Ignition may requve several tries as the piping
ts purged of atr

Fill the boiler and system with water making certain
to vent all air from all points in the system To check
water level in the system open and close each vent
m the system Water should exit from each vent
when it _s opened

12 Use the sequence descnptlons

The pressure reducing valve on the fill hne w=ll
typically allow the system to be hlled and pressurized
to 12 pm Consult the vab+,e and expansion tank
manufacturer for mote specff,c reformation

13 The gas manifold and control assembly are made of

Check lotnts and fitting+ throughout the system for
Leaks [f leaks are found dram the system and repatr
as required

m Figures 17 18 and
19 in Section 6 (Electrical) to follow l,ght-off and
shutdown sequences and to asmst m dmgnosmg
problems If the boiler does not funcbon properly
consult Section 8, Troubleshooting

gas-tlght completely factory assembled and installed
components of the base assembly See Figure 22
and 23

!UUUL

'_ PILOI

THERMOCOUPLE
LEAD

SECTION A

Figure 22: Gas Valve,

Manifold

_EAD

and Burner Assembly

- Standing

Pilot

(Continuous

Ignition)

-GAS
VALVE

_\
A "_

Figure

23:

Gas Valve,

Manifold

PILOT TUBING

ORIFICE

SECTION A

MAN,FOLD

_TEST

TAPPING

and Burner Assembly

7
/

- Intermittent

Ignition

GAB PRESSURE REGULATOR
ADJUSTMENT SCREW

22_BURE / _UNOER
CA_
SCREW)

TAP
LET_ouUTLETIN

NOTE:

Figure

24: Valve

Tapping

TLET

THERMOCOUPLE
CONNECTION
(STANDING
PILOT ONLY)

LOCATIONS
PILOT AND

and Adjustment

PRESSURE

TAP

PILOT ADJUSTMENT SCREW
(UNDER CAP SCREW)

ARE SIMILAR FOR STANDING
INTERMITTENT IGNRION VALVES.

Screw

Locations

FOR YOUR
you
I causing
WARNING:
If
property
A.

SAFETY

READ

BEFORE

not

exactly,

do
follow
these
instructions
damage,
personal
injury,
or toss of life.

This appliance is equipped with an ignition device
which automatically lights the pilot. Do not try to
light the pilot by hand.
BEFORE OPERATING smell all around the

OPERATING

STOP!
label.

Read the safety information above on this

Set the thermostat

Turn off all electric power to the appliance.

This appliance is equipped with an ignition device
which automatically lights the pilot. Do not try to
light the pilot by hand.

to the lowest setting.

/--GAS

CONTROL

a fire or explosion

result

Use only your hand to slide the gas control switch,
Never use tools. If the switch will not slide by hand,
don't try to repair it, call a qualified service
technician. Force or attempted repair may result in a
fire or explosion.

Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of
the control system and any gas control which has
been under water,

WHAT TO DO OF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch;
do not use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.

may

• If you cannot reach your gas supplier, call the fire
department.

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor.

OPERATING

INSTRUCTIONS
5.

If the gas valve is not visible, remove control access
panel.

If the gas control switch is not in the "OFF" position,
slide the switch to "OFF".

Wait five (5) minutes to clear out any gas. If you
then smell gas, STOP! Follow "B" in the safety
information above this label. If you don't smell gas,
go to the next step.

Slide the gas control switch to "ON".

Replace control access panel, if applicable.

10.

Turn on all electric power to the appliance.

11.

Set the thermostat to desired setting.

12.

If the appliance will not operate, follow the
instructions "To Turn Off Gas To Appliance"
your service technician or gas supplier.

SWITCH

TO TURN

OFF GAS TO APPLIANCE

Set the thermostat

Turn off all electric power to the appliance if service
is to be performed.

Slide the gas control switch to "OFF".

Replace control access panel, if applicable.

If the gas valve is not visible, remove the control
access

Figure

to lowest setting.

and call

25:

panel.

Operating

SV95011SV9601

Instructions

9318

I[,-']t-';

FOR YOUR

SAFETY

READ BEFORE

• ,'_

WARNING: If you do not follow these instructions exactly, a fire or explosion
result causing property damage, personal injury or loss of life.

LIGHTING
1. STOP!
label.

Read the safety

information

above

2. Set the thermostat

to lowest setting.

3. Turn off •11 electric

power to the appllence.

If the gas valve is not visible, remove
panel.

If the gas control knob is not in the "OFF"
turn the knob clockwise _
to "OFF."

Gas Control Knob
(shown in _OFF"
position)

F'-

Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push
In or turn by hand, don't try to repair it, call a qualified service technician.
Force or attempted repair
may result in a fire or explosion.

Do not use this appliance if any pert has been under
water. Immediately cell a qualified service technician to inspect the appliance and to replace any part
of the control system and any gas control which
has been under water.

Find pilot--follow
metal tube
from gas valve. The pilot is
between two burner tubes.

9. Turn the gas control knob counterclockwise #"% to
"PILOT."

position,
10. Push In red reset button all the way and hold in.
Immediately fight the pilot with • match. Continue to
hold the reset button in for •bout one (1) minute
after the pilot is lit. Release button and it will pop
back up. Pilot should remain llt. If it goes out, repeat
steps 5 through 10.

•

INLET

•

If button does not pop up when released, stop
and immediately call your service tachnici•n
or
gas supplier.
If the pllet will not stay lit after several tries,
turn the gas control knob to "OFF" and cell
your service technician or gas supplier.

Walt five (5) minutes to clear out any gas. Then
smell for gas, including near the floor. If you smell
gas, STOP; Follow "B" in the safety information
above on this label. If you don't smell gas, go to the
next step.

11. Replace

Remove the pilot access panel, if supplied, located
below and behind the gas valve directly above burner tubes

14. Turn on all electric power to the •ppllance.

_TO

TURN

1. Set the thermostat

If the gas valve is not visible,
panel.

pilot access panel, if applicable.

12. Turn gas control
to "ON."
13. Replace

knob counterclockwise

control access panel, if applicable.

15. Set thermostat

to desired

OFF GAS TO APPLIANCE

to lowest setting.

2. Tum off all electric power to the appliance
is to be performed.
3.

Pilot Burner

RED RESET BUTTON

on this

J*o_ id 41

setting.

Turn the gas control

knob clockwise (_

26:

Lighting

to "OFF."

Replace control access panel, if applicable.

if service

remove control access

H24V

Figure

may

INSTRUCTIONS

control aceess

• If you cannot reach your gas supplier, call the
fire department.

B. BEFORE OPERATING smell •round the appliance
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle
on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance
• Do not touch any electric switch;
do not u•e any phone In your building.
• Immediately
call your gas supplier from a
neighbor's
phone. Follow the gas suppller's
instructions.

•

LIGHTING

A. This •ppU•nce has a pilotwhich must be lighted by
hand. When lighting the pilot, follow these instructions exactly.

VR8200

9177R

Instructions

IsJ V-ll_i ilJ-*t iLhl_l

:]q '=*,[*]=_//;{*]n Im]:_'[*_;]lM/[*]_:
See Figure 16 in Section 6 (Electrical) for locations
these devices.

Turn Gas Control Knob to "Pilot"
in Figure 26.

Locate and remove the pilot adjustment cap screw
using Figure 24.
2. Remove pilot observation port cover on base front
panel.
3. Turn the pilot adjustment screw clockwise until the
pilot flame extinguishes. Then increase the pilot flow
just to the point that the gas valve holds in when
relighting the pilot per steps 9 and 10 of Lighting
Instructions in Figure 26 (turn screw no more than
an i/8 turn).

The first few turns of the adjustment screw may not
cause any change in the pilot flow, Subsequent
partial turns of the adjustment screw may have a
great impact on pilot flow.

LOW WATER CUT-OFF (FOR GRAVITY SYSTEMS
OR HOT WATER BOILERS INSTALLED ABOVE
RADIATION LEVEL) - A level-sensing device (float
or probe) located in supply piping near the boiler. If
water level in the system drops below the control's
position, it will shut down main burner gas. The
control will automatically reset once the water level
rises above its position.

Using the manometer setup installed in part 7A, set
manifold pressure as follows for various gases.
a. Natural Gas ..........
3.5" Water Column
LPGas

............

I0.0" Water Column

To adjust gas pressure, turn adjusting screw of gas .
pressure regulator counterclockwise to decrease
pressure, clockwise to increase pressure. Refer to
Figure 24 for location of gas pressure regulator.
Replace the cap screw when adjustment is complete.

4.
5.

Turn on electric power to the appliance.
Turn Gas Control Knob to "On" position per the
Lighting Instructions in Figure 26.

Verify pilot remains lit after shutdown from a boiler
"ON" cycle of at least ten minutes. If pilot
extinguishes, follow Lighting Instructions in Figure 26
and again slightly increase pilot flow.
Make a final slight increase in the size of the pilot to
ensure sufficient pilot signal under all operating
conditions, just to the point that you observe a slight
increase in the size of the flame (no more than an
I/8 turn).
Replace adjustment cap screw and observation port

cover.

[*4:I=[NNh_(€4
I.

:|lJ:t_J_:t

IIL_I'._IJ

Refer to rating label mounted on the jacket top panel
to obtain the rated BTU per hour input. In no case
shall the input to the boiler exceed the value shown
on the rating label.
Check input by use of the following formula
(Peerless suggests reading meter for 2 Cu.Ft.):
BTU/Hr. Input=3600

In no case should the final manifold pressure vary
more than ±0.3 inches water column from the
above specified pressures. Any necessary major
changes in the flow should be made by changing the
size of the burner orifice spuds.
When adjustment is complete, turn off boiler, gas
flow and electricity to boiler. Remove manometer
connection from valve and plug tapping with plug
provided. Turn utilities back on and resume
checkout.

position as shown

LIMIT (AQUASTAT) - A thermally activated,
manually adjustable switch located on the left side of
the boiler, towards the top and rear. The temperature
sensing element is placed in the supply and will shut
down main burner gas if the supply water exceeds
the preset temperature limit. This is a recycling
switch that will automatically reset when the supply
water falls below the preset temperature.

Turn off all electric power to the appliance.

VENT SAFETY SHUT-OFF SWITCH (SPILL
SWITCH) - A thermally activated, manually
resetable switch located in the draft hood relief
opening. If venting system becomes partially or
totally blocked, the vent safety shut-off switch will
sense excessive temperature caused by flue products
exiting the draft hood relief opening and shut down
main burner gas.

L:JI I[*]t 11[€1r-"!.:1
I_ K*PA

To maximize thermocouple life, particularly on natural
gas installations with gas supply pressures above 9"
W.C.. reduce the pilot gas flow

FLAME ROLL-OUT SAFETY SHUT-OFF SWITCH
(FLAME ROLL OUT SWITCH) - A thermally
activated switch located between the first burner
from the left and the manifold bracket. The flame
roll-out safety shut-off switch will sense excessive
temperature caused by continued flame roll out and
shut down main burner gas. This is a non-recycling
switch that must be replaced once it has been
activated and the cause of the roll-out eliminated.

i [*];

3600
F
H
T
3.

x FxH
T

Seconds per hour
Cubic Feet of Gas Registered on Meter
Heat Value of Gas in BTU/Cubic Feet
Time in Seconds the Meter is Read

As an alternative, use Table 5. Use the heating value
provided by gas supplier. Use a stopwatch to record
the time it takes for 2 cubic feet of gas to pass
through the meter. Read across and down to
determine rate.

Table

Meter

Conversion

- Natural

Gas

iv) Observe boiler operation
complete cycle

Burner inputs in Btu/hr for various meter timings and
heat values. (Tables based on 2 cubic feet of gas through
meter).

Intermittent
i)

Time that
meter is
read (sec)

Heat Value of Gas
(Btu/cubic foot)
1000

1025

1050

25
30

288000
240000

295200
246000

302400
252000

35
40

205714

210857

216000

180000

184500

189000

45
50

160000
144000

164000
147600

168000
151200

130909

134182

137455

120000

123000

126000

110769

113538

116308

102857

105429

108000

96000

98400

100800

90000
84706

92250
86824

94500
88941

80000
75789

82000
77684

84000
79579

I00

72000

73800

75600

105

68571

70286

72000

110

65455

67091

68727

115

62609

64174

65739

120

60000

61500

63000

125

57600

59040

60480

85
90

I;;I

Standing
i)

iv) Turn gas supply on.
v) Reset the boiler and conlrol by following
Operating Instructions.
vi) Observe boiler operation
complete cycle.

Low Water Cut-Off (if used) - Consult the
manufacturer's instructions for the low water cut-off
operational check procedure.

Check the system to make sure there are no leaks or
overfilling problems which might cause excessive
make-up water to be added. Make-up water causes
liming in the boiler and brings in oxygen. Oxygen
can cause severe damage to the boiler though
oxygen corrosion pitting.

Check the expansion tank and automatic fill valve (if
used) to confirm that they are operating con-ectly. If
either of these components causes high pressure in
the system, the boiler relief valve will weep or open,
allowing fresh water to enter the system.

Do not allow the system controls to subject the boiler
to excessively low water temperatures, which would
cause condensation of flue gases and corrosion of
the boiler. Operate the boiler at a temperature above
130°E Adjust the boiler limit as required to maintain
boiler temperature above this level.

Check the general condition of the system including
piping support, joints, etc. Check cleanliness of the
radiators, baseboard units and!or convectors. Clean
them to the extent possible. If radiators do not heat
evenly, vent any remaining air from them.

Review operation
with end-user.

Complete the Warranty Card and submit it to
Peerless Heater Company.

Pilot:

ii) Extinguish the pilot flame. Pilot gas flow
should stop within 2-I/2 minutes. Complete
shutdown is proven since the safety shut-off
valve has stopped main and pilot gas flow.

through one

of the ignition system safety

Turn the gas control knob counterclockwise
"PILOT". The main burner should go out
and the pilot should remain lit.

Turn gas supply off

iii) Igniter will continue to glow for 30 seconds,
de-energize for 30 seconds, then re-energize
and glow for another 30 seconds. It will then
de-energize for 5 minutes before restarting
the sequence.

After starting the boiler, be certain all controls are
working properly. Check to be sure that the limit will
shut off the boiler in the event of excessive water
temperature. This can be done by lowering the limit
setting until the main burners shut down. When
proper limit function is confirmed, return the dial to
its previous setting.
To check operation
shut-off features:

Ignition System:

it) Set thermostat or controller above room
temperature to call for heat. Watch for igniter
glow at pilot burner.

[O4:l=(O4[_eleJld :J;{ole]=lmlgl;|
I.

through one

and User's Information

Manual

i0. Hang the Installation, Operation and Maintenance
Manual and User's Information Manual in an
accessible position near the boiler.

iii) Reset the boiler by following Lighting
Instructions.

When servicing or replacing items that communicate
with the bonier water, be certain that"
In the event of a shut-down
actLon of the blocked vent
out safety

shut-off

swltch

caused by a pLlot outage
shut-ott sw_tch or flame Tolleffechng

a shin-down

of the

mallq burners

Refer to the Lighting, Operating Instructions Ln
Figures 25 and 26 to properly turn oft the gas to the
boiler

Turn off all electric power to the boder

Call a qualified heatlng servlce orgamzahon or Local
gas company and have the cause of the shut-down
mveshgated and corrected

Refer to L_ghtlng'Operatmg
re start bo_ler

I |'{o]lJ

:| i :_'t : [oil)

i h,_[_ [_lll

Instruchons

I I] :_

Use Table 6 to assist m determining causes and
prowdmg corrective actions to boiler problems Refer
also to Figure 27 to _oubleshoot the [merm_ttent lgnLtLOn
System Control These guLdes must be used only by
quahhed serwce techntoans
These mdwlduals must
tollow all apphcable codes and _egulat,ons ,n repair of
any bo,le_ problems

• There is no pressure on the boLler
• The boiler us not hot.
• The power is off.
When servicing the gas valve or pilot, be certain that:
• The gas is off.
• The electricity is off.

Do not use this appliance if any part has been under
water. Improper or dangerous operation may result.
Immedmtely call a qualified service technician to
inspect the bonier and to replace any part of the
control system and any gas control which has been
under water.

Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.

Should overheating occur or the gas supply fail to
shut off, do not turn off or disconnect the electrical
supply to the pump.This may aggravate the problem
and increase the likelihood of boiler damage. Instead,
shut off the gas supply at a location external to the
appliance.

Inj ;[.luJ :_! _;
Table

Boiler

Troubleshooting

Burners not functioning

Guide

] No power

I Check line voltage wiring and fuses.

2. Limit (aquastat) not working

2 Check wiring and contacts, relay, temperature
setting. Clean and adjust as necessary

3. Flame rollout switch open

3. Replace switch Locate cause and correct.

4. Blocked vent switch open

4. Reset blocked vent switch. Locate cause and correct.

.5 Gas off at boiler gas valve

5 Start boiler using Lighting/Operating
Instructions.

6 Gas off external to boiler

6 Check any gas valves in the line.

7 Plugged orifice spuds

7 Check, clean and re-install.

8. Defective gas valve

8 Use Figure 27 to troubleshoot intermittent
ignition gas valve. Replace if necessary.

9 Improper

9. Check and correct in accordance
diagrams in Section 6.

wiring

10 Vont damper

Burners will not shut
down

Flashback or burning
at orifice spuds.

malfunctioning

ignition.

2. Check and correct wiring.

I. Manifold gas pressure too low

I. Adjust to proper pressure.

2. Improperly

2. Install correct spuds.

sized/drilled

orifice spuds.

3. Leaking gas valve

3 Replace valve.

4 Burrs on orifice.

4. Remove

5 Low supply gas pressure.

5. Contact gas supplier if natural gas. Adjust
regulator if LP gas.

or draft problems

burrs.

6 Check air supply, ventilation

and venting system.

l Insufficient pilot flame

1. Increase pilot gas flow,

2. Pilot burner/orifice

2. Clean pilot burner and orifice.

clogged.

3. Reduce

5 Draft problem

or pilot.

rate to input on rating label.

4. Realign burners

in boiler room.

or pilot.

5. Check air supply, ventilation
system.

I. Underfiring

and venting

I. Increase rate to input on rating label.

2. Limit (aquastat)

set too low.

2. Reset aquastat

3 Vent pipe too long.
4. Inadequate chimney

3. Reposition
or venting system.

to higher setting.

boiler to reduce length.

4. Check chimney and venting recommendations.

1. Underflring
2 Limit set too low.

1. Increase rate to input on rating label.

3. Air in system.

3. Vent air from all points in system.

4. Circulator

4. Check circulator, replace if necessa W.

6. Incorred

2. Reset aquastat

malfunctioning.

5 Circulation

Fumes or gas odors

instructions.

2 Short circuit

4 Misaligned burners

Boiler not heating
properly.

manufacturer's

1. Use Figure 27 to troubleshoot intermittent
ignition gas valve. Replace if necessary.

30verfiring.

Excessive condensation in
vent.

Refer to vent damper
Replace if necessary.

with wiring

1. Defective gas valve.

6 Excessive downdraft
boiler room
Delayed

[oD_ ni1_L_

system clogged.
thermostat

heat anticipator

to higher setting.

5. Shut down and cool boiler, drain and flush
system.
setting.

6. Adjust heat anticipator.

I. Leaks in gas piping or fittings.

I. Locate and repair or replace.

2. Leaks in gas service line or meter

2. Shut down boiler and notify gas provider.

3. Obstructed

chimney.

3. Check, repair and/or clean chimney.

40bslructed

flueways or vent.

4. Clean fiueways or vent and remove obstructions.

5 Undersized
in vent

chimney or vent, high draft loss

5. Check National Fuel Gas Code and vent
manufacturer's
recommendations.

6 Draft problem

in boiler room.

7. Overfiring.
8 Vent damper

6. Check air supply, ventilation
7. Reduce

malfunctioning.

and venting system.

rate to input on rating label.

8. Refer to vent damper
Replace if necessary.

manufacturer's

instructions.

INSET A
END VIEW OF
24 VOLT
THERMOSTAT

CONTROL
HARNESS
CONNECTOR

START
• ASSURE GAS VALVE SWITCH IS
iN "ON" POSITION
• DISCONNECT
SYSTEM CONTROL
HARNESS
I •• TURN
OFF GAS SUPPLY
SET THERMOSTAT
TO CALL
FOR HEAT

VOLTS
24 VOLT
COMMO

24 VOLT
VOLTS

HOT

CHECK FOR DAMAGED OR MISSING
TERMINALS
IN CONNECTOR
INSET B

I1
l

CHECK FOR PROPER VOLTAGE
AT CONTROL HARNESS (SEE INSET
A). VOLTAGE SHOULD BE 24V
BETWEEN THERMOSTAT
AND
24V COMMON,
24V COMMON

AND 24V BETWEEN
AND 24V HOT.

YES

ii i: ',Fo

CHECK:
• LINE VOLTAGE POWER
• LOW VOLTAGE TRANSFORMER
• LIMIT CONTROLLER
• THERMOSTAT
•WIRING
• VENT DAMPER IS OPEN AND END
SWITCH MAKES

UNPLUG PILOT BURNER CABLE.
MEASURE VOLTAGE AT GAS VALVE
HSI ELEMENT OUTPUT (SEE INSET B)
24V NOMINAL

I, .:W,:oW
RMSUPAND
Q
+
NOTE: iGNITER WILL CYCLE OFF
AND BACK ON ONCE GURING THE
90 SECOND IGNITION TRIAL

• PILOT BURNER IJGHTS
• TURN ON GAS SUPPLY

GAS VALVE

RECONNECT

PILOT BURNER

CABLE

YES
VOLTAGE

BETWEEN

24V

VALVE. MUST MEASURE AT LEAST
19.5 VAC WITH IGNITER POWERED.
SEE INSET A TO IDENTIFY PROPER
LEAD. THIS CHECK MUST BE DONE
HOT AND
LEADS TO GAS
WITH
THE 24V
GASCOMMON
VALVE CONNECTED

YES

AND IGNITER

CABLE
RECONNECTPILOTBURNER

REPLACE

• CHECK THAT PILOT GAS IS FLOWING.
WAIT TO ASSURE PILOT GAS TUBING
IS PURGED,

_=_

• MEASURE

,NO,
_

GAS VALVE

CHECK TRANSFORMER

LINE VOLT SUPPLY

POWERED,

YES

RE P LACE IG NITER/FLAM

E ROD ASSIEMBLY ]

GOOD CONTACT
FLAME ROD.

BURNEROPENS
LIGHTS
I MAIN
MAIN VALVE
AND

WITH PILOT BURNER

• CHECK FOR GOOD ELECTRICAL
CONNECTION
THROUGH THE PILOT
TUBING
•• IF
BOTH
OF
THE
ABOVE
AREMAKES
GOOO,
CHECK THAT PILOT
FLAME
REPLACE IGNITER/FLAME
ROO
ASSEMBLY.

YES

I I

CYCLE THERMOSTAT

SYSTEM

IS OKAY

Figure 27:

Intermittent

Ignition

System

YEs
IREP CE'GN'TE
I
MEROOA--OLY
I

YES

I '

REPLACE

MAIN BURNER

OFF AND BACK ON

LIGHTS

Troubleshooting

Sequence

REPLACE

GAS VALVE

AND

h',!_,!1_i i 4 _<'_!_,l
7[.I:

9. MAINTENANce.
5

l-*! [€l _ L'I_IP.t.
1

Disconnect
this boiler from
durung any pressure
testing

Check pipes adjacent
to cold walls or in unheated
spaces
Insulate and tape them Lfnecessary
to be
sure they can t freeze up Keeping the water moving
at all times will reduce the likelihood
of freezing
See
Section 3 for antifreeze instnictions

Smell around

the apphance

alea

It you smell

for gas

gas. follow the procedure
listed m the
LLghtJng, Operatlng
Instructions
m Section

the gas supply piping
of the gas system

lllhll

I 1 [! li'illrlll
I

/ i I I :[o] I I 11tl li'lllll-'t

Flush float-type low-water cut-off (if used) to remove
sedLment from the float bowl as stated m the
manufacturer's instructions

Uill_'5 [oli_i / l lii'llli,_i / I: i :io] I I 1 :g h,'_lil..'ti
3

If there is considelable foreign matter in the boiler
water the boiler should be shut down and allowed to
cool then drained and thoroughly flushed out Use
the dram valve at the bottom of the return
connect,on to drain the boiler Pipe the dram cock to
a suitable drain or containment dewce _f antifreeze is
used Flush the system to remove remaining matter
If there is evidence that hard scale has formed on the
internal surfaces, the boiler should be cleaned by
chemical means as prescribed by a quahhed water
treatment specLal_st

Check boiler room floor dlalns fol proper
functioning

Check function of the safety relief valve (monthly
unless speofled otherwise by manufacturer) by
performung the follo_,,ung test
a Check valve pLpmg to determine that ,t is
properly installed and supported

There must not be signs of continuous wetness at the
chimney If s_gns of continuous wetness are
observed, a qual_hed service agency must be
consulted to modify the vent confLguratLon to prevent
the tormatlon of condensate
i:II

Ill7,_!ll'lllVi_li/ll

Lift the ti'y level on the safety relief valve to the
full open position and hold Ltfor at least five
seconds or until clean water LSdischarged

:loll!!llh"lll--'l"

Remove any combustible materials, gasohne and
other flammable hqulds and substances that generate
flammable vapors from the area where the bouler LS
contained Make certain that the boiler area has
ample air for combustion and venhlation and that
there are no obstructions to the free flow of air to
and from the boiler
Observe general boiler conditions
vibrations, etc )

temperature

and pressure

If the valve continues to leak. it must be replaced
before the boiler is returned to operation

Check that operating pressure and temperature
have returned to normal

Check again to confirm that valve has closed
completely and is not leaking

Test low-water cut-off (if used) as descnbed
manufacturer

Test limit as described

(unusual noises,

Observe operatLng temperature and pressure on the
combmatlon gauge located on the left side of the
boiler Boiler pressure should never be higher than
5 psl below the rating shown on the safety rehef
valve {25 ps_g max,mum for a 30 psLg rating, 45 pslg
maximum for a 50 pslg rating) The valve rating can
be found on the top of the safety relief valve (see
Figure 5 for location of the safety relief valve) Boiler
temperature should never be higher than 250 GF
4

Check boiler operating

Release the try lever and allow the valve to close
If the valve leaks, operate the lever two or thlee
times to clear the valve seat of foreign matter It
may take some t_me to deteu'mne _tthe valve has
shut completely

Daily boiler observatLon can be performed by the owner
If any potential problems are found, a quahfLed installer
or service techmc_an,'agency must be notffued

Procedure

by the

in Section 7E "Check-Out

Test function of gas safety shut-off features as
described by gas valve and ugnution control
manufacturer

Cycle the boiler at least once and check operation
the vent damper

Check for water leaks in boiler and system piping

OUTE
ON
[)ARK BL JL
IN CC' OR

i
//_\
,

When servicing or replacing components, be
absolutely certain that the following conditions are
met:
• Water, gas and electricity are off.
• The boiler is at room temperature.
• There is no pressure in the boiler.
1.

Check flueways and burners for cleanliness and dean
if necessary. Use the following procedure if cleaning
is required:
Figure

Refer to the Lightin_Operating
Instructions in
Figures 25 and 26 to properly turn off the gas to
the boiler.

Turn off all electrical power to the boiler.

Remove burners and brush gas outlet ports
lightly using a soft bristle brush.

28:

Pilot

and

Main

Burner

CONE

IN COLOR

Brush flueways with wire brush.
To the extent possible, inspect inside of vent pipe
and vent damper for obstructions in flow or vent
damper movement. Remove or replace as
necessa[v.

Re-install baffles on MIH models. When replacing
the flue collector/draft hood, be certain that the
blanket seal between the flue collector and top
section makes a tight seal to prevent leakage of
the products of combustion.

Re-install the top of the jacket, vent damper
vent pipe.

Re-install burners.

Flame

FLA_EB
INNER
BLUE

d. Remove the vent pipe, vent damper, top jacket
panels and flue collector/draft diverter. Remove
baffles on MIH models.
e.

Standing

and

Inspect entire venting system for corrosion, support
and joint integrity. Repair as necessary.

Check the pilot and main burner flame. See Figures
28 and 29. The pilot should provide a steady flame
enveloping 3/8" to i/2" of the flame sensor. If
required, adjust the pilot as stated in the gas valve
manufacturer's
instructions. The main burner flame
inner cone should be approximately 1-1/2" high and
should have a very sharp, blue color characteristic.

Figure 29:

Intermittent
Pilot and Main
Burner Flame

10. BOILER DIMENSIONS

8 RA !N GS

I
I.

I,
i

_,111

rllt_

FLLIEF

TEtd_"
E_ - [iIPE
b-

I_IFE

,L_=

LIrL

Figure

30: Boiler Views

Table 7:

Series

MI/MIH

Boiler

Dimensions
111:i I 1i,.I1_ I a_ I I: I :[l] I I1_1:i 1] I_ I =1_._1[l]_p
I

Jacket

Boiler

Table 8:

Left of Jacket

Rear of Jacket

Vent Connector

to c ]ot Vent
D

to c ] of Vent
E"

Size
F

Depth
B'

I Top _o F]oo_
C'

ML,MIH-03

121 -/'

20_ "

31%"

61 ,"

2013Le"

MI$4IH-04
MbMIH-05

15%"
19 _4"

26%"

31%"

7 n ,_

20_,,J

M['MIH-06

22%"

26%"
26%"

31%"
31%"

9_ '
11%."

2Ill,#"
21_'_ "

6"
6"

MI-07

26"

26%"

31_ "

13"

21_q_ "

MI-08

29%"

31%"

14 u =_"

235h_"

MI-09

32_"

29_,_,,

31%-

16%-

24%e-

.ode]

Number

Series MI/MIH

Width

;

DOE
Heaung
Capacity

Water

Efficiency

Number

MBH

MBH3

MBHI2

(AFUE)3

M 1-04
M 05
MI-06'

MIH-04
MH-05
MIH-06

I.i.

MI-08

MJ-07_I]39,N/A
N/A _
MI-09

N'A

I05
140
175

975
130
11625

Mi I ,H

piping

s_s[ems

8..

86
115
143

_95 11 N,,A
N/A

186

160 /1_

N'A

162

260

211

NIA

;

183

2275

N,A

i
I
I

having
15

_l_
108
135_

unusual

EMc[enc_
I

75
i_4
124

piping

1
_

and pickup

70
94
117

802
802
803

N/A
_821
N/A
820
N/A_20

Content

MIH

(Gal)

831
830
830

600
728
856

805 t N/A
N,A [I 82o
820 /1 N'A
N,AI_

N/A

803

N A

80 1

requlrement_

I
1
_

Water

(AFUE)3

:Mill,

_
_

ConsulI
factory
before
s_]e_lng
boiler
_or installations
Net I=B=R
water
ratings
based aon
an allowance
of 1
e_.[enslv_

Boiler Ratings

AG A
Input

IMIH

Boiler
Model

;

such

N_A

as intermittent

82 0

system

N,A

operahon

]2
98_

12 40

L_I_I_!

etc

3 Heatln9 Capacityand Annual FuelUbl_anon Efficiency (AFUE) rabngsare based on U S Governmenttest
N[H ModelsAvailable asNatural Gas wn[hInlerm_ttenl
IgmhonOnly

]3 ;;_ EPAI R_PABTS
REPAIR
SERIES

MI/MIH

PARTS
GAS BOILER

Repair parts are available from your installer or by contacting Peerless Heater Company,
Boyertown, PA 19512-1021.
Use the figures and tables on pages 32-41 to assist in
ordering parts.
Note Remember

to include boiler model number and serial number when ordenng

Figure

31: Base/Combustible

Floor Pan

parts

Table

Base/Combustible

Floor

Pan

Base Assembly

91518

91883

91897

91909

93561

93573

81036

Observation

51771

81771

Base Blanket Seal

50867

90700

90701

90702

90703

90704

90705

90706

]

Combustible

Cover Door

Floor Pan Assembly

Specify length

,,6) _\\

Figure

Table

32: Manifold

10:

Figure

Manifold/Gas

Train (MI - Standing

Steel Burner

Pilot

Pilot)

! Specify quantity

•

6 _Steel
i

33: Gas Valve and Pilot - Standing
(Continuous
Ignition)

_as

Burner w/Pilot

Clip

I per boiler
-

Manifold

51263

i 50978

" 50979

50980

50981

0954

50955

: 50894

50894

i 50895

50895

51263

8 _'_i Orifice Spud_48

i Natural

Gas,O 2000

i elevation
Natural

o,ficespuZ_49
I

elevation

_Or_f_ce
Spud,
#57
Honeywell VR8200A2116

Gas Va]ve

[ Nat. Gas

Honeywe!! VR820(_6040

Gas Valve

LP Gas

] Honeywell

VR8300A4003

Gas Valve

I Honeywell

VR8300C4035

Gas Valve

Q314A3505

50899

Pilot

ft.

i 50900 50900_ s0900

(specify qty)

!
50581

50581

50221

5022i
i50 21'

;0s87
! 0587

Nat Gas

91333

i LP Gas
I Nat. Gas

: 50899

! elevation
i

Honeywell

91333

HoneYwell Q314A3703 pi!ot
I HoneywellQ309A2119-24"
Thin

*For elevations

. LP Gas
I

over 2,000 feet above sea level contact

' 91333

51688

50555

i 50555

51318

! 51318

51318

i 51318

•

50895

(specify qty)

i LP Gas, 0-2000

ft.

(specify q_)*

i LP Gasl 0;2000

Orifice Spud, #56

(specify qty)*

Gas, 0-2000

elevation

ft,

Peerless Heater Company.

51688
;

Figure 34: Gas Valve
Table

11:

and Pilot - Intermittent

Manifold/Gas

Steel Burner

Steel Burner w/Pilot

Gas Manifold

Orifice Spud, #48

Train

ignition

(MI - Intermittent

Speci_

quanfl_

Natural

Gas, 0-2000

Natural Gas, 0 2000 ft.

Orifice Spud, #56

LP Gas. 0-2000

SV9501M2700

Gas Valve

Natural

SV9501M2064

Gas Valve

LP Gas

Honeywell

SV9601M4167

Gas Valve

Honeywell SV9601M4225 Gas Valve•
Honeywell Q3480B1025
Pilot
Honeywell

*For elevations

Table

12:

Q3480B1033

Pilot

Manifold/Gas

Steel Burner w/Pilot

Gas Manifold

Orifice Spud, #49

50894

,
i

51537

s09 ,

50956

i 50895--50895
[

ft.

50899

50895

[

50899

50900

i Natura! Gas

! 51682

i 51682

51682

J 51691

51691

i 51691

i LPGas

50900

I
i

[

]

Lp Gas
Natural Gas

50900

Gas

]
1

L
! 5168451684
I 51685

Train (MIH - intermittent

:
51_

81685

51685

51537

_6!!_692
;51684
51685

516_
51685

51684
] 51685

!51684
] 51685

ignition)

Specify quantily
Clip

1 per boiler

51539

Natural

Gas, 0-2000

Gas Valve

Natural Gas

Gas Valve

Natural Gas

Pilot

fi.

50895

I 50895

51539

] 50980 [ S098i
50895

Natural Gas

i 50895
i

(specify qty)*

Honeywell SV9601M4167
Honeywell Q3480BI025

51539

5097850979

Honeywell SV9501M2700

*For elevations

51537

(specify qty)

elevation

[

over 2,000 feet above sea level contact Peerless Heater Company•

Steel Burner

50894

LP Gas, 0-2000 It.
elevation (specify q_}

Honeywell

51537

(specify qty)*

elevation

Honeywell

51537

: s0979
50980

fi.

Orifice Spud, #49

Orifice Spud, #57

51537

i 51539i51539
51539i51539
51539!51539
i 51539

(specify qty)*

elevation

51537

lperbo er

Clip

elevation

Ignition)

51682

!
51683

, 51684

i 51684

51684

] 51684

over 2,000 feet above sea level contact Peerless Heater Company,

Figure

35: Block/Draft

Hood

Table

13A: Block/Draft

Hood

91280

Block Assembly

Flue CollecloriDraft

Hood

Flue CollectorlDraft

Hood

Table

90511

_ Flue Collector Blanket Seal

13B: Flue Baffles

Flue Baffle - 4"
Flue Baffle - 8"

50866

Specify length

50866

for MIH Only

1 per flue (specify qty)

51583

1 per flue (specify qty)

Figure 36: Jacket

Table

14:

Jacket

,Jacket Assembly

]6A

Left Side Panel

16B

Right Side Panel

16C

Rear Panel

16D

Top Panel

16E

Inner Front Panel

16F

Baffle Panel

16G

Removable

16H

Upper Front Panel

*Complete

Jacket Consists

Complete
insulation

jacket* with
and screws

90445

90446

90447

90448

90449

90450

90451

of:

Front Panel

I_t"-Jl_I_ 1;t I=a_l_-']

Figure

37: Controls/Circulator/Vent

Damper

Table

15:

Controls/Circulator/Vent

Circulator w/Flanges.

1%" x 2_//' Nipple*

1%" Tee*

11/4" x 4" Nipple*

IV4" x 3/4" Bushing*

Damper

50736

Gaskets and Hardware*

99236

50736
99236

50736

50735

99236

425

99967

1539

50517

51689

51774

50501

Safety Relief Valve, 50 psi*, Watts #350

99950

Flame Roll-Out Safety Shut Off Switch

51587

Blocked Vent Shut Off (Spill) Switch

51590

Vent Damper

90608

90609

90610

90611

3/4"Drain Valve*

Honeywell

24
25

L8148E1182

Temperature-Pressure

Limit w/%"

Well*

Gauge

! Safety Relief Valve, 30 psi*. Conbraco

10-408

*Available from distributor

Series

MI/MIH

Gas

Boilers

Installation,
Operation
Maintenance
Manual
TO THE

INSTALLER:

This manual
be affixed
TO THE
This

the boiler

of the owner
for future

and must

reference.

OWNER:
boiler

Qualified

HI Division

is the property
near

should
Service

inspected

annually

Agency.

ASME

of gama

PEr-I_LESS

CAST IRON BOILERS

PEERLESS

HEATER

COMPANY

231 NORTH WALNUT STREET • BOYERTOWN, PA 19512-1021 • PHONE 61_367-2153
vvww.peerless-heater.com
THE

@2002

Peerless

Heater

Company

PREFERRED

HEATING

CHOICE

MI8038

R5 (12/02-10M)
Printed in U.S.A.

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