Carrier GC Series Installation Instructions Manual

13Water Tank Preparation1. Turn off electrical or fuel supply to the water heater.2. Attach garden hose to water tank drain connection and runother end of hose out doors or to an open drain.3. Close cold water inlet valve to water heater tank.4. Drain tank by opening drain valve on the bottom of thetank, then open pressure relief valve or hot water faucet.5. Once drained the tank should be flushed with cold wateruntil the water leaving the drain hose is clear and free ofsediment.6. Close all valves and remove the drain hose.7. Install HR water piping.HRP Water PipingAll hot water piping MUST be a minimum of 5/8” O.D. coppertube to a maximum distance of 15 feet. For distances beyond 15feet, but not exceeding 60 feet, use 1/2” copper tube. Separatelyinsulate all exposed surface of both connecting water lines with3/8” wall closed cell insulation. Install isolation valves on supplyand return to the heat recovery. (See Fig. 15)Water Tank Refill1. Open the cold water supply to the tank.2. Open a hot water faucet to vent air from the system untilwater flows from the faucet, then close.3. Depress the hot water tank pressure relief valve handle toensure there is no air remaining in the tank.4. Carefully inspect all plumbing for water leaks. Correct asrequired.5. Using the air bleed valve, purge all air from water piping,allowing all air to bleed out until water appears at valve.6. Before restoring the power or fuel supply to the waterheater, adjust the temperature setting on the tank thermo-stat(s) to ensure maximum utilization of heat available fromthe refrigeration system and to conserve the most energy.On tanks with thermostats on both upper and lower ele-ments, the lower element should be turned down to 100_F,while the upper element should be adjusted to 120_F.Depending upon the specific needs of the customer, youmay need to adjust the upper element differently.On tanks with a single thermostat, lower the thermostat set-ting to 120_F or the “LOW” position. After thermostat ad-justments are completed, replace access cover and restoreelectrical or fuel supply to water heater.IMPORTANT: Copper should be used for piping from HRP todomestic water tank(s). Use 5/8” (16mm) O.D. copper orlarger. Refer to local codes for hot water piping. Insulate thewater lines between the GHP and the water heater with aminimum of 3/8” (10mm) closed cell insulation.Shut-off Ball ValveAir Bleed ValveDomestic Hot Water SupplyWater Heater(w/active elements)Domestic Cold Water SupplyWater Heater(no active elementspre-heat tank)Cold Water InHPHot Water OutShut-off Ball ValveAir Bleed ValveDomestic Cold Water SupplyHPHot Water OutWater Heater(w/active elements)One Tank SystemTwo Tank System (preferred)Package unit shown. GC package unit arrangement similar with different water locations on unit. A150174Fig. 15 -- HRP Water Piping