Lochinvar 100 Series, Руководство пользователя

Страница: 21 / 44

17
2. Ensure required clearances are maintained and there is
access for servicing. See Clearances on page 10.
WATER PIPING
3. Ensure the outlet (supply) and inlet (return) water piping
connected to the HPWH are not less than the connection
size on the unit. See Table 1 on page 8.
4. Ensure swing-type check valves (not spring-loaded types)
are installed on outlet lines of all heat pumps plumbed in
parallel to prevent hot water short-circuiting.
5. When the HPWH is connected to a storage tank ensure the
storage tank is equipped with a properly rated and sized
Temperature and Pressure (T&P) relief valve. Refer to the
storage tank manufacturer’s instructions for T&P valve sizing
and installation requirements.
Note: This is a critical installation requirement that must not
be overlooked. Call the toll free technical support phone
number at the back of this manual for further assistance.
6. DO NOT install a T&P valve in the outlet (supply) water line of
the HPWH unless required by local code.
7. Ensure isolation valves are installed on the HPWH supply
and return water line at the storage tank for servicing and
purging the air from the HPWH during start-up.
8. Ensure the cold water supply is not connected directly to or
Tee fi tted to the inlet water line on the HPWH. See the Service
and Installation Notes for Inlet & Outlet Water Temperature
on page 9.
9. Connect building recirculation loop piping to the backup
water heater inlet on two tank preheat piping confi gurations.
10. Ensure the building recirculation loop pump is controlled by
a fi eld supplied line thermostat and that it stops the pump
when the recirculation line temp exceeds the manufacturer’s
specifi cations.
11. When the HPWH unit is installed above the storage tank install
a Tee fi tting at a high point in the outlet water line with a
purge valve to bleed air during start up.
12. The manufacturer recommends installing a strainer at the
inlet water line on the HPWH to help prevent scale build up
in the heat exchanger. Service costs to clear blockages from
the HPWH unit’s heat exchanger due to debris are not
covered under the limited warranty.
ELECTRICAL
13. BEFORE ENERGIZING THE UNIT ensure the power supply
voltage and phase matches the requirements on the
HPWH rating label. Damage resulting from applying the
wrong voltage or phase is not covered under the limited
warranty.
14. Ensure the power supply breaker or the fuses disconnect
switch are within the requirements for the unit as shown
on the HPWH rating label.
STANDARD TANK THERMOSTAT
Standard tank thermostats (Aquastat) already installed in the
storage tank may be used instead of the factory supplied
Digital Tank Thermostat if desired. Ensure the standard tank
thermostat is installed the lower third of the tank. Wire the
existing tank thermostat to the HPWH terminal strip.
TEMPERATURE SENSOR INSTALLATION
The HPWH unit is shipped from the factory with a Digital Tank
Thermostat that includes a Temperature Sensor:
1. Secure the Temperature Sensor inside a Sensor or Thermal Well .
2. Install the sensor well in the storage tank’s designated
temperature control opening. It is not recommended to
install the temperature probe or sensor in the bottom or
the top of the tank. It is typical to install in the mid to lower
portion of the tank.
Do not install the temperature sensor near the cold water
supply connection to the storage tank to prevent short cycling.
The list below represents some of the most critical installation
requirements that, when overlooked, often result in operational
problems, down time and needless parts replacement. This is
not a complete list. Before performing any troubleshooting
procedures use the list below to check for installation errors.
Costs to correct installation errors are not covered under the
limited warranty. Ensure all installation requirements and
instructions in this manual have been followed.
LOCATION
1. Ensure the HPWH is located where there is a adequate supply
of source water for optimal performance.
FIGURE 8
INSTALLATION CHECKLIST