Service manual

Figure 5
T & P Relief Valve
150 PSI
Min 1/4” in rise
per linear feet
Vent Connector
Vent
Sheet Metal Screws
Return Line
from service
(When Used)
Hot Water Service
Hot Water
Outlet
Hand Hole
Clean Out
Shut-Off
Valve
Expansion Tank
Use an Expansion
Tank in a closed
Water System
Discharge to an OPPEN DRAIN, DO NOT thread,
cap or plug the end of discharge line,
Discharge line should be at least ¾” ID
and pitched for proper drainage to open drain.
Drain Valve
Drip Pan with suitable drain
Shut-Off Valve
To Water Heater
Drain Spud
Tee
Drain Cock
Relief Valve
150 psi
Check Valve
Return Line from
circulating loop
PUMP
PUMP
Drip Leg and Cap (Sediment Trap)
Thermostat
Rating Plate
Manual Shut Off Valve
Ground Joint Union
Minimun 3”
Open Drain
MIN 6”
Cold Water Supply
Hot water
Shut off valve
Shut off valve
Shut off valve
Shut off valve
Bleed valve
System return
Union
Union
Expansion tank
Water supply
Back flow
preventers
PUMP
Check
Valve
Cold
Water
Inlet
STORAGE TANK
TYPICAL INSTALLATION
SINGLE COMMERCIAL GAS MODEL
TOP CONNECTIONS WITH RETURN CIRCULATION
109