Chromalox CES-6 - Manual (Page 16)

Automatic water feed is required on all CES Boilers:
LOW PRESSURE FEED
Note: Water Pressure feeds must be at least 10 psi greater than steam
pressure.
Low pressure water feed systems are used to supply make up
water to the boiler where incoming water line pressure is 10 psig or
greater than the operating pressure of the boiler. It consists of strainer,
solenoid valve and check valve.
Installation
The low pressure water feed systems are optional, and are factory
plumbed and wired to the boiler. However, CES series boilers which
are shipped from stock, the ES-99117 feed is shipped separately for
field installation.
Field Installation
Note: The low pressure feed is to be plumbed to the inlet of the fac-
tory mounted check valve located on the make up water inlet to the
boiler. The plumbing and wiring are to be conducted by licensed per-
sonnel in accordance with national and local electrical codes. For
wiring refer to wiring diagrams supplied with the boiler.
HIGH PRESSURE FEED
High pressure makeup water pumps are used when water pressure
does not exceed boiler pressure by more than 10 psi and when con-
densate water is not returned to the boiler. Note: Consult factory or
sales office for motor/pump sizing for appropriate water feed system.
WARNING: Hazard of Electric Shock. Water feed system
must be effectively grounded in accordance with the
National Electrical Codes to eliminate shock hazard.
Installation
1. Locate feed on level floor or platform.
2. Connect water line to tagged fitting on feed.
3. Connect piping from discharge to water inlet check valve on boil-
er with minimum of 90˚ bends or other restrictions.
4. All electrical wiring should be done by licensed electricians in
accordance with local and national electrical codes. Refer to boil-
er instruction for manual wiring diagram.
5. If pump is located less than 30 feet from boiler, a second check
valve is required.
CONDENSATE RETURN SYSTEMS
Chromalox condensate return systems are used wherever con-
densed steam can be collected for reuse in the boiler. Significant ener-
gy can be saved by returning condensate to the boiler. The condensed
water is free from corroding minerals and carries a substantial amount
of heat which does not have to be replenished.
IMPORTANT: Vacuum breaker is required whenever using a con-
densate return system.
WATER FEED SYSTEMS
Automatic Low Pressure Water Feed
16
Pipe Dimensions (In.)
Assembly Pressure Size
Model No. H.P. Range NPT A B C D E F
ES-38002 1/3 0-100 1/2” 12 10 11 7-3/8 6-1/2 7-1/2
ES-38020 1/2 0-150 3/4” 12 10 11 7-3/8 6-1/2 7-1/2
Pump Motor Dimensions
Automatic High Pressure Water Feed
Pump Motor and Piping Assembly
D
F
A
B
C
E
1/2" Water Fill 1-1/4" NPT Vent 1-1/4" NPT Cond. Return
1/2" NPT
Drain See Detail
Pump
Support
Leg
Detail Pump Mount
Frame
Member
1/2" Water Fill
18”
H
26 and 33 Gal. Condensate Return System
Condensate For Max Storage Tank Pump Discharge Condensate
Model Boiler Model Pressure (psig) Capacity (Gals.) Pump (hp) Motor (Volts/Phase) Conn. (NPT) Ret. Conn (NPT) L H W
ES38083V CES 12 - 72 100 26 1/3 120 1 1 1 23 46 18
ES38084V CES 100 - 180 100 33 1/2 120 1 1 1 23 52 18
Low Pressure Pressure
Boiler (Solenoid Feed) Volts Inlet (In.) Range
CES Series ES-99117 120 1/2 0-100 psi
Dimensions (In.)