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Unit IP Subnet – This number is used to determine the size of
the network the unit is connecting to. (ex. 255.255.255.0)
Master IP Address – This is the address of the Lochinvar
Systems Master Panel (ex. 192.168.1.50)
Unit Number – Only used for custom network confi gurations,
this confi gures your Lochinvar unit to connect to a Master Panel
under a desired number.
MAINTENANCE AND SERVICE
ROUTINE MAINTENANCE
Warning: When possible, disconnect all power to the unit and
follow the prescribed lock - out/tag - out procedure to prevent
accidental electrocution. Should the unit have to be serviced
with live electricity, only trained and qualifi ed technicians
should carry out the service. Failure to follow all of the safety
warnings may result in serious injury or death.
The temperature-pressure relief valve must be manually operated
at least once a year. Caution should be taken to ensure that (1)
no one is in front of or around the outlet of the temperature
pressure relief valve discharge line, and (2) the water manually
discharged will not cause any bodily injury or property damage
because the water may be extremely hot. If after manually
operating the valve, it fails to completely reset and continues
to release water, immediately close the cold water inlet to the
heat pump, follow the draining instructions in the storage
tank manual, and replace the temperature-pressure relief
valve with a properly rated/sized new one.
If you do not understand these instructions or have any questions
regarding the temperature-pressure relief valve call the toll
free number listed on the back cover of this manual for technical
assistance.
CLEANING INTERNAL INSULATION
Inspect the internal insulation on a yearly basis for any microbial
growth. The insulation never has to be cleaned unless microbial
growth is detected. If microbial growth is detected, follow the
removal steps below:
1.
Disconnect all power to the unit and follow the prescribed
lock-out/tag-out procedure.
2.
Wear the prescribed personal protective equipment
prescribed from the cleaning product instructions.
3. Remove as much dirt and organic material from
the insulation using a vacuum device with a HEPA fi lter
(99.97% effi cient at 0.3 micron particles). Be careful not to
tear the insulation during the cleaning procedure.
4.
Apply the microbial cleaning agent as prescribed by the
application and usage instructions.
5.
Allow the unit to dry thoroughly.
6.
If necessary, apply an anti-microbial agent on the insulation
per the instructions provided on the product label.
Discard collected microbial contaminants as required by local
or state codes.
CHECKING REFRIGERANT CHARGE
Servicing of the refrigeration circuit must only be performed
by agencies or individuals possessing Type II or Universal
certification as defi ned in Section 608 of the Clean Air Act.
See Qualifi cations on page 3.
This HPWH unit is factory charged with 134a refrigerant. See
the rating label on the HPWH unit and Table 9 for refrigerant
charge by weight. It should not be necessary to add or
remove refrigerant during installation or start up. Refrigerant
lost during frequent refrigerant pressure testing can cause low
refrigerant conditions. Air and water fl ow should always be
checked fi rst to eliminate other potential problems before
checking the refrigerant charge.
CHECK WATER TEMPERATURE RISE
Always check water temperature rise through the HPWH
unit's internal heat exchanger before checking the refrigerant
charge. See Start Up on page 19 .for information on how to
measure the water temperature rise.
If the measured water temperature rise during start up was
within 8°F to 12°F (4°C to 7°C) checking the charge is not
necessary unless other conditions warrant testing.
If the measured temperature rise through the HPWH unit is
less than 8°F (4°C) checking the charge is not necessary
unless other conditions warrant testing. Short water piping
runs between the HPWH and the storage tank will produce
lower temperature rises and are not problematic.
If the measured temperature rise through the HPWH unit is
more than 12°F (7°C) check for restrictions in the inlet and outlet
water piping connected between the HPWH unit and the storage
tank.
TABLE 9
Model
MHP0270
MHP0540
MHP0810
MHP1080
MHP1350
MHP1620
MHP1890
MHP2160
Factory Charge R134A
40 lbs
80 lbs
120 lbs
160 lbs
200 lbs
240 lbs
280 lbs
320 lbs
25
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