Brochure

“135M2” for single phase, 3 wire, 120V/208V WYE, 120V/240V
(see note (1) below) with control circuit breaker.
“345M2” for three phase, 4 wire, 120V/208V WYE.
(see note (1) below) with control circuit breaker.
Example: EH-20-135M2=20KW boiler for single phase 3 wire,
120V/208V, 120V/240V, with EM-10 boiler control.
Specify Model as follows: Model Number. Single or three Phase Voltage.
ELECTRICAL
FOR USE WITH TWO-WAY ZONE VALVES
PIPING 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
down-stream 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-40M2 FS8W 1
1
⁄4 IN. 8
1
⁄2 IN.
EH-24M2- EH-32M2 FS4-3T3-1 1 IN. 6
1
⁄2 IN.
EH-8M3- EH-20M3 FS4-3T3-1 1 IN. 6
1
⁄2 IN.
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) below.
• Heating elements: Low-density replaceable. Copper sheathed
and silver brazed base.
OUTDOOR
SENSOR
AUTO AIR VENT
ABOVE BUILT-IN
COLLECTING
CHAMBER
FLOW SWITCH
(SEE NOTE 3)
RELIEF
VALVE
1
1
⁄4" SUPPLY
TAPPING
ALTERNATE
CIRCULATOR
LOCATION
BOILER
OUTLET
SENSOR
OPTIONAL
AUTO FILL
VALVE
BYPASS
LINE
TO SYSTEM
TRIDICATOR
1
1
⁄4" RETURN
TAPPING
FILL
DIAPHRAGM
COMPRESSION
TANK
THROTTLING
VALVE OR
COCK
FROM SYSTEM
CIRCULATOR
(SEE NOTE 2)
DRAIN
VALVE
(SEE NOTE 1)
Monotron II
Minitron III
1
1
⁄4" RETURN
TAPPING
Monotron II
Minitron III
ELECTRICAL NOTES: 1. Voltage of any line to ground cannot exceed 125 VAC.
RATINGS AND SPECIFICATIONS
©2016 Slant/Fin Corp. • Printed in U.S.A. 816 • Publication EH-M2/M3-10
®
BOILERS & BASEBOARD
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Since 1949
U.S.A.
Slant/Fin Corporation • 100 Forest Drive
Greenvale, NY 11548 • 516-484-2600
www.slantfin.com
Canada
Slant/Fin LTD/LTEE • 400 Ambassador Drive,
Mississauga, Ontario L5T 2 J3 • 905-677-8400
www.slantfin.ca
** 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 (3 Amp. max.),
‡ Leg with the highest value of line current of an unbalanced 3 phase load.
Boiler
Model No.
SINGLE
PHASE
‡ KW at
208 VAC
SINGLE
PHASE
KW at
240 VAC
SINGLE
PHASE
D.O.E
Capacity
(Btu/hr) at
208 VAC
SINGLE
PHASE
D.O.E
Capacity
(Btu/hr) at
240 VAC
Neutral Lug Size (AWG) SINGLE PHASE –– THREE WIRE THREE PHASE –– FOUR WIRE 120/208 VAC WYE
Solid
Cu
Stranded
Cu
Main Lug
Size (AWG)
CU
Grounding
Lug Size
(AWG)
Cu
† ** Heater
Amps at
240 VAC
KW at
208 VAC
D.O.E
Capacity
(Btuh) at
208 VAC
Main Lug
Size (AWG)
CU
Grounding
Lug Size
(AWG)
† Heater
Amps at
208 VAC
EH-8M3 6 8 21000 27000 14-12 12 6-2/0 6-2/0 33 — — — — —
EH-10M3 7.5 10 26000 34000 14-12 12 6-2/0 6-2/0 42 — — — — —
EH-12M3 9 12 31000 41000 14-12 12 6-2/0 6-2/0 50 9.012 31000 6-2/0 6-2/0 43.4
EH-16M3 12 16 41000 55000 14-12 12 6-2/0 6-2/0 67 12.016 41000 6-2/0 6-2/0
‡ 57.8
EH-20M3 15 20 51000 68000 14-12 12 6-2/0 6-2/0 83 15.020 51000 6-2/0 6-2/0
‡ 72
EH-24M2 18 24 62000 82000 14-12 12 6-2/0 6-2/0 100 18.024 62000 6-2/0 6-2/0
‡ 69
EH-28M2 21 28 72000 96000 14-12 12 6-2/0 6-2/0 117 21.028 72000 6-2/0 6-2/0
‡ 69
EH-32M2 24 32 82000 109000 14-12 12 6-2/0 6-2/0 133 24.032 82000 6-2/0 6-2/0
‡ 83
EH-40M2 30 40 103000 137000 14-12 12 2-310 MCM 6-2/0 167 30.040 103000 6-2/0 6-2/0
‡ 108.3