Hot Water Generator Connections - York 33p502-05 Installation Manual

LX ULTRA SERIES INSTALLATION MANUAL

Hot Water Generator Connections

The heat reclaiming hot water generator coil is of vented double-
wall copper construction and is suitable for potable water.
To maximize the benefits of the hot water generator a minimum
50-gallon water heater is recommended. For higher demand
applications, use an 80-gallon water heater or two 50-gallon
water heaters connected in a series as shown below. Electric
water heaters are recommended. Make sure all local electrical
and plumbing codes are met for installing a hot water generator. A
water softener is recommended with hard water (greater than 10
grains or 170 total hardness).
Water Tank Preparation
To install a unit with a hot water generator, follow these installation
guidelines.
1. Turn off the power to the water heater.
2. Attach a water hose to the water tank drain connection and run the
other end of the hose to an open drain or outdoors.
3. Close the cold water inlet valve to the water heater tank.
4. Drain the tank by opening the valve on the bottom of the tank, then
open the pressure relief valve or hot water faucet.
5. Flush the tank by opening the cold water inlet valve to the water
heater to free the tank of sediments. Close when draining water
is clear.
6. Disconnect the garden hose and remove the drain valve from
the water heater.
7. Refer to Plumbing Installation and Hot Water
Generator Startup.
Plumbing Installation
1. Inspect the dip tube in the water heater cold inlet for a check
valve. If a check valve is present it must be removed or
damage to the hot water generator circulator will occur.
2. Remove drain valve and fitting.
3. Thread the 3/4-inch NPT x 3-1/2-inch brass nipple into the
water heater drain port.
4. Attach the center port of the 3/4-inch FPT tee to the opposite
end of the brass nipple.
5. Attach the 1/2-inch copper to 3/4-inch NPT adaptor to the side
of the tee closest to the unit.
6. Install the drain valve on the tee opposite the adaptor.
7. Run interconnecting tubing from the tee to HWG
water out.
8. Cut the cold water "IN" line going to the water heater.
Typical Hot Water Generator Installation
3/4 in. x 3/4 in. x 1/2 in. Tee
Ball Valve
Vent
Water Out
Field Installed
HWG
Water In
Hot Water Generator Installation In Preheat Tank
3/4 in. x 3/4 in. x 1/2 in. Tee
Ball Valve
Vent
HWG
Water In
NOTE: This configuration maximizes hot water
generator capability.
CAUTION: Elements will burn out if energized dry.
9. Insert the reducing solder tee in line with cold water "IN" line
as shown.
10. Run interconnecting copper tubing between the unit DHW
water "IN" and the tee (1/2-inch nominal). The recommended
maximum distance is 50 feet.
11. To prevent air entrapment in the system, install a vent coupling
at the highest point of the interconnecting lines.
12. Insulate all exposed surfaces of both connecting water lines
with 3/8-inch wall closed cell insulation.
NOTE: All plumbing and piping connections must comply with local
plumbing codes.
16
Cold
Hot
Water In
Water Out
HWG
P/T Relief
Valve
In
HWG Pump
Drain Valve
Cold
Water In
HWG
Water Out
P/T Relief P/T Relief
Valve
In
Field Installed
HWG Pump
Drain Valve
Hot
Water Out
Valve