Product Overview

* 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.
“135-S2” for single phase, 120V/240V, 120V/208V WYE. 3 wire
(see note (1) below) with control circuit breaker.
“345-S2” 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-20-135-S2=20KW boiler for 240V/208V.
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. Alternative circulator location could be installed on
supply piping. 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
⁄4 IN. 8
1
⁄2 IN.
EH-8 Thru EH-32 FS4-3T3-1 1 IN. 6
1
⁄2 IN.
©Slant/Fin Corp. 2019. Printed in U.S.A. 1019 Publication EH-10
RATINGS AND SPECIFICATIONS
• 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
TYPICAL PIPING DIAGRAM
U.S.A.
Slant/Fin Corporation • 100 Forest Drive
Greenvale, NY 11548 • 516-484-2600
www.slantfin.com
Canada
Slant/Fin LTD/LTEE • 6450 Northam Drive
Mississauga, Ontario L4V 1H9 • 905-677-8400
www.slantfin.ca
®
BOILERS & BASEBOARD
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Since 1949
Boiler
Model No.
SINGLE
PHASE
* KW at
240 VAC
SINGLE
PHASE
D.O.E
Capacity
*(Btu/hr) at
240 VAC
Neutral Lug
Size (AWG)
SINGLE PHASE - THREE WIRE THREE PHASE - FOUR WIRE 208 VAC WYE 240 VAC DELTA
Main Lug
Size (AWG)
CU ¶ AL
Grounding Lug Size (AWG)
† ** Heater
Amps at
240 VAC
Main Lug
Size (AWG)
CU ¶ AL
Grounding Lug Size (AWG)
FLA
Amps at
240 VAC
Solid
Cu ¶ AL
Stranded
Cu ¶ AL
Cu ¶ AL Cu ¶ AL
EH-8-S2 8 27000 14-12 12 6-2/0 14-4 6-4 33 ––– ––– ––– –––
EH-10-S2 10 34000 14-12 12 6-2/0 14-4 6-4 42 ––– ––– ––– –––
EH-12-S2 12 41000 14-12 12 6-2/0 14-4 6-4 50 6-2/0 14-4 6-4 42.6
EH-16-S2 16 55000 14-12 12 6-2/0 14-4 6-4 67 6-2/0 14-4 6-4 ‡58.9
EH-20-S2 20 68000 14-12 12 6-2/0 14-4 6-4 83 6-2/0 14-4 6-4 ‡69.8
EH-24-S2 24 82000 14-12 12 6-2/0 14-4 6-4 100 6-2/0 14-4 6-4 ‡69.8
EH-28-S2 28 96000 14-12 12 2-250 MCM 14-4 6-4 117 6-2/0 14-4 6-4 ‡81.7
EH-32-S2 32 109000 14-12 12 2-250 MCM 14-4 6-4 133 6-2/0 14-4 6-4 ‡83.6
EH-40-S2 40 137000 14-12 12 2-250 MCM 14-4 ––– 167 6-2/0 14-4 6-4 ‡110.2