Slant/Fin Monitron EH Boilers Ratings And Specifications, Typical Piping Diagram, Electrical

RATINGS AND SPECIFICATIONS

		SINGLE			SINGLE PHASE –– THREE WIRE				THREE PHASE –– FOUR WIRE 208 VAC WYE §
	SINGLE	PHASE	Neutral Lug			Grounding				D.O.E		Grounding
		D.O.E	Size (AWG)			Lug Size						Lug Size
Boiler	PHASE	Capacity	Solid		Main Lug	(AWG)		† ** Heater		Capacity	Main Lug	(AWG)		† Heater
	* KW at	*(Btu/hr) at		Stranded	Size (AWG)			Amps at	KW at	(Btuh) at	Size (AWG)			Amps at
Model No.	240 VAC	240 VAC	Cu ¶ AL	Cu ¶ AL	CU ¶ AL	Cu	¶ AL	240 VAC	208 VAC	208 VAC	CU ¶ AL	Cu	¶ AL	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.

Specify Model as follows: Model Number. Single or three Phase.

“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.

ELECTRICAL

•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

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.

	Flow Switch		Minimum Length of
		Pipe	Straight Pipe Upstream
	McDonnell		and Down-Stream
Boiler Model	& Miller No.	Size	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. 2003. Printed in U.S.A. 1203. Publication EH-10

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