Slant Fin Monitron Eh Boilers Users Manual

Monitron EH Boilers to the manual a72e2688-5484-c824-f140-9b2a47b025d4

2015-02-05

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A major answer to the changing heating-fuel situation
HOT WATER MODELS IN 9 SIZES
8 kw (27,301 Btuh) to 40 kw (136,506 Btuh)
Before purchasing this appliance,
read important energy cost and
efficiency information available
from your contractor.
Monitron Compact, easy to install for new or “standby” installations
Monitron combines the availability and dependability of electricity with the
comfort and performance of conventional hydronic heating using baseboard,
radiant or cast-iron radiators.
Monitron as a replacement unit: Works with virtually any existing
hot water hydronic radiation system. Although rated in kilowatts, it is
also clearly identified by BTU output.
Monitron as a standby unit: Particularly suitable for commercial
and industrial facilities, or office buildings which can’t risk down-time
with their existing heating equipment. If oil or gas is temporarily unavail-
able, the owner easily switches the heating system to the electric boiler.
Monitron as a primary heating unit offers:
• The convenience of electricity and the comfort of hydronics.
• The elimination of a chimney.
• Competitive pricing with electric baseboard systems.
• Simple zoning by zone valves.
Monitron by Slant/Fin is the electronic-age boiler designed to save
energy for new or existing heating systems.
America’s Best - Built Electric Boiler
• One piece cast-iron heat exchanger.
• Built in air eliminator.
• Internal baffles improve heat transfer.
TM
TYPICAL WIRING DIAGRAM
TO ZONE VALVE
TRANSFORMER
WHEN USED
Monitron installed as primary boiler.
With manual mild-weather energy-saver switches *
Energy-saver
electric sequential control package *
NORMAL OPERATIONS
When the thermostat calls for heat, the circulator turns on and the
first electric heater bank is energized. At preset 30-second intervals,
the other heater banks automatically energize. The circulator contin-
ues operating until the room thermostat is satisfied. A flow switch
supplied by Slant/Fin or others is required. It prevents the elements
from being energized unless the circulator is operating. This avoids
element burnout.
* All models except EH-8 and EH-10
OPTIONAL MILD-WEATHER OPERATION
Mild-weather energy savings are made possible through the use of
circuit breakers on the breaker panel. This permits the owner to
manually switch off one or more of the elements. Then, when just a
moderate amount of heat is needed, all the elements are not ener-
gized, cycling is reduced, and overheating is diminished. This ener-
gy-saving feature is standard on Monitron models EH-12-S through
EH-40-S.
Standard equipment
• Dual limit aquastat
• Altitude pressure and temperature gauge
• Safety relief valve (unmounted)
• Circulator relay and heater contactors
• Circuit breaker (one or two heaters per breaker)
• Low voltage thermostat with adjustable heat anticipator
(packed separately)
• Drain cock, 3⁄4" (packed separately)
• Built-in air separator
• Cast-iron ASME approved heat exchanger
• Terminal blocks for circulator, thermostat, flow switch and
for zone valve transformer
• Sequencer
• Complete jacketing
• U.L. listed, ASME authorized
• Flow switch. Not included with, but necessary on all models
• Circuit breaker for circulator and control circuit.
FEATURES
NOTES:
1. May be totally enclosed.
2. All clearance dimensions are
minimum.
3. All dimensions are in inches.
HEATER
ELEMENTS
CAST IRON
ASME HEAT
EXCHANGER
DUAL LIMIT AQUASTAT
CONTACTORS
FOR HEATER
ELEMENTS SEQUENCER ALTITUDE
PRESSURE
AND TEMPERATURE
GAUGE
30 PSI PRESSURE
RELIEF VALVE
CIRCUIT BREAKERS
TERMINAL
BLOCKS
CIRCULATOR
RELAY
DIMENSIONS
Boiler
Model No.
SINGLE
PHASE
* KW at
240 VAC
SINGLE
PHASE
D.O.E
Capacity
*(Btu/hr) at
240 VAC
Neutral Lug
Size (AWG)
Solid
Cu ¶ AL Stranded
Cu ¶ AL
SINGLE PHASE –– THREE WIRE
Main Lug
Size (AWG)
CU ¶ AL
Grounding
Lug Size
(AWG)
Cu ¶ AL
† ** Heater
Amps at
240 VAC
THREE PHASE –– FOUR WIRE 208 VAC WYE §
KW at
208 VAC
D.O.E
Capacity
(Btuh) at
208 VAC
Main Lug
Size (AWG)
CU ¶ AL
Grounding
Lug Size
(AWG)
Cu ¶ AL
† Heater
Amps at
208 VAC
EH8S 8 27000 14-12 12 6-2/0 14-4 6-4 33 ––– ––– ––– ––– ––– –––
EH10S 10 34000 14-12 12 6-2/0 14-4 6-4 42 ––– ––– ––– ––– ––– –––
EH12S 12 41000 14-12 12 6-2/0 14-4 6-4 50 9.012 31000 6-2/0 14-4 6-4 25.1
EH16S 16 55000 14-12 12 6-2/0 14-4 6-4 67 12.016 41000 6-2/0 14-4 6-4 ‡38.1
EH20S 20 68000 14-12 12 6-2/0 14-4 6-4 83 15.020 51000 6-2/0 14-4 6-4 ‡48
EH24S 24 82000 14-12 12 6/2/0 14-4 6-4 100 18.024 62000 6-2/0 14-4 6-4 ‡60
EH28S 28 96000 14-12 12 2-250 MCM 14-4 6-4 117 21.028 72000 6-2/0 14-4 6-4 ‡60
EH32S 32 109000 14-12 12 2-250 MCM 14-4 6-4 133 24.032 82000 6-2/0 14-4 6-4 ‡73
EH40S 40 137000 14-12 12 2-250 MCM 6-2/0 ––– 167 30.040 103000 6-2/0 14-4 6-4 ‡95.4
* Multiply by 0.751 for values at 208 volts AC.
** Multiply by 0.867 for values at 208 volts AC.
† For total current add, to the value shown in the table, the current draw for
circulator and/or zone valve transformer (12 Amp. max.),
‡ Leg with the highest value of line current of an unbalanced 3 phase load.
Aluminum conductors may be used, lug size, conduit size, ampacity and all
applicable codes permitting. However, aluminum conductors may not be
used for model EH-40 single phase.
§ 3 phase 240V special model also available.
Consult factory for information.
“135S” for single phase, 120V/240V, 120V/208V WYE. 3 wire (see
note (1) below) with control circuit breaker.
“345S” for three phase, 120V/208V WYE. 4 wire (see note (1)
below) with control circuit breaker.
Note No. 1: Voltage of any line to ground cannot exceed
125 VAC.
Example: EH-20-135S=20KW boiler for 120V/240V.
120V/208V Single Phase 3 wire.
Specify Model as follows: Model Number. Single or three Phase.
ELECTRICAL
FOR USE WITH TWO-WAY ZONE VALVES
NOTES:
1. Optional blocking gate valve and hose end valve
used (with drain valve) for fast fill and purge of
system.
IMPORTANT Close bypass line valve
(if used) during purging.
2. Circulator should not be installed at lowest point
of piping.
3. There should be no elbows, tees, or change of
pipe size for at least 5 diameters of pipe size
(see table below) upstream and downstream of
flow switch.
Boiler Model
Flow Switch
McDonnell
& Miller No. Pipe
Size
Minimum Length of
Straight Pipe Upstream
and Down-Stream
of Flow Switch
EH-40 FS8W 1 1⁄4IN. 8 1⁄2IN.
EH-8 Thru EH-32 FS4-3T3-1 1 IN. 6 1⁄2IN.
© Slant/Fin Corp. 2003. Printed in U.S.A. 1203. Publication EH-10
RATINGS AND SPECIFICATIONS
TYPICAL PIPING DIAGRAM
•Single branch circuit for 3 wire 120/208 V WYE, 120/240 Volt a.c.
single phase, 60 Hz or for 4 wire 120/208V WYE three
phase, 60Hz a.c. See note (1) above.
•Circulator relay 12 AMP Max, 120V a.c.
•Heating elements: Low-density replaceable. Copper sheathed
and silver brazed base.
•Relays: Heavy-duty contactors, 48 AMP U.L. rating
SLANT/FIN CORPORATION., Greenvale, N.Y. 11548 • www.slantfin.com
Phone: (516) 484-2600 • Fax: (516) 484-5921
In Canada: Slant/Fin LTD/LTEE, Mississauga, Ontario • www.slantfin.ca

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