Heat Controller HTS SERIES manual HWG Water Piping, Water Tank Refill, Initial Start-Up

HEAT CONTROLLER, INC. WATER-SOURCE HEAT PUMPS

R e s i d e n t i a l S p l i t - 6 0 H z R 4 1 0 A

R e v. : 0 3 A u g u s t , 2 0 1 2

Hot Water Generator

HWG Water Piping

1.Using at least 1/2” [12.7mm] I.D. copper, route and install the water piping and valves as shown in Figures

15 or 16. Install an approved anti-scald valve if the 150°F HWG setpoint is or will be selected. An appropriate method must be employed to purge air from the HWG piping. This may be accomplished by flushing water through the HWG (as in Figures 15 and 16) or by installing an air vent at the high point of the HWG piping system.

2.Insulate all HWG water piping with no less than 3/8” [10mm] wall closed cell insulation.

3.Open both shut off valves and make sure the tank drain valve is closed.

Water Tank Refill

1.Close valve #4. Ensure that the HWG valves (valves #2 and #3) are open. Open the cold water supply (valve #1) to fill the tank through the HWG piping. This will purge air from the HWG piping.

2.Open a hot water faucet to vent air from the system until water flows from faucet; turn off faucet. Open valve #4.

3.Depress the hot water tank pressure relief valve handle to ensure that there is no air remaining in the tank.

4.Inspect all work for leaks.

5.Before restoring power or fuel supply to the water heater, adjust the temperature setting on the tank thermostat(s) to insure maximum utilization of the heat available from the refrigeration system and conserve the most energy. On tanks with both upper and lower elements and thermostats, the lower element should be turned down to 100°F [38°C] or the lowest setting; the upper element should be adjusted to 120-130°F [49-54°C]. Depending upon the specific needs of the customer, you may want to adjust the upper element differently. On tanks with a single thermostat, a preheat tank should be used (Fig 16).

6.Replace access cover(s) and restore power or fuel supply.

Initial Start-Up

1.Make sure all valves in the HWG water circuit are fully open.

2.Turn on the heat pump and allow it to run for 10-15 minutes.

3.Set S3-4 to the “ON” position (enabled) to engage the HWG.

4.The HWG pump should not run if the compressor is not running.

5.The temperature difference between the water entering and leaving the HWG coil should be approximately 5-10°F [3-6°C].

6.Allow the unit to operate for 20 to 30 minutes to insure that it is functioning properly.

Table 6: HWG Water Piping Sizes and Length

Unit	Nominal	1/2" Copper	3/4" Copper
Nominal	HWG Flow
		(max length*)	(max length*)
Tonnage	(gpm)
2.0	0.8	50	-
3.0	1.2	50	-
4.0	1.6	45	50
5.0	2.0	25	50

*Maximum length is equivalent length (in feet) one way of type L copper.

NOTICE! Make sure the compressor discharge line is connected to the “Hot Gas In” stub on the Heat Recovery Unit.

CAUTION!

CAUTION! Locate Refrigerant lines to avoid accidental damage by lawnmowers or children.

WARNING!

WARNING! The HWG module is an appliance that operates in conjunction with the heat pump system, the hot water system and the electrical system. Installation should only be performed by skilled technicians with appropriate training and experience. The installation must be in compliance with local codes and ordinances. Local plumbing and electrical building codes take precedence over instructions contained herein. The Manufacturer accepts no liability for equipment damaged and/or personal injury arising from improper installation of the HWG module.

22 Heat Controller, Inc. Water-Source Heating and Cooling Systems