21
Note: A Solar Storage Tank Add-On Kit can be used for this installation configuration.
This kit is available through your distributor. The tank is plumbed as shown.
3: Tank Plumbing—Dual Tank
STEP 1: RE-DIRECT WATER SUPPLY
Re-direct the cold water supply line from the water heater cold inlet, to the tee above the temperature control
valve as shown. Use one of the new flexible hoses unless you prefer to use the existing hose. When attaching
to the cold water supply line, connect directly to threads. If no threads are present use the provided adapter,
3/4” compression X 3/4” MPT. For 1” copper tubing, purchase a 1” compression adapter.
STEP 2: INSTALL BYPASS VALVES
Apply thread sealant and assemble the 2-way valves, fittings and tees as shown. Connect using 4 provided flex-
ible hoses. Do not use thread sealant on flexible hose connections. Important: Before turning on the electricity or
gas supply, be certain that the tank is full of water.
STEP 3: FILL TANK & ACTIVATE ELECTRICAL/GAS SUPPLY
With the system in normal operating position, and a hot water faucet still open, turn the cold water shut off valve
on to allow water to enter the tanks. The open hot water faucet will permit air to be purged from the tank. Close
the faucet when the water becomes a constant flow and all air is purged. Inspect for leaks and tighten connec-
tions where necessary. Reconnect and activate electrical or gas supply. Open or close the isolation valves as
shown to switch between normal operating position and bypass position. All interconnecting hot water piping and
the final 5 feet of cold water supply pipe shall be insulated with R-2.6 or greater insulation. Attach provided valve
position label to the cold water shut off valve. Attach Storage Tank Bypass label to one of the 2-way valves. Attach
Cold Water Shut-Off Valve label to cold water shut-off valve.
Normal Operating Position
Bypass Position
Temperature
Control Valve
Hot Water
To Home
H
H
C
C
Cold Water
Supply
Cold Water
Shut-Off Valve
Storage Tank
Water Heater
Bypass Valves
Storage Tank Bypass Label
Bypass Valves
Storage Tank
Water Heater
Summary of Contents for Drainback 200 Series
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