TemperZone MWS Series Installation & Maintenance

Heat Pump Water Heaters : Potable (Single Pass)
CONTENTS
1. General ................................................................ 1
2. Installation............................................................ 1
3. Wiring.................................................................. 2
4. Commissioning................................................... 3
5. Maintenance....................................................... 4
6. Troubleshooting.................................................. 4
7. Warranty............................................................ 5
Commissioning Sheet ........................................... 6
Appendix I : UC8 Controller................................. 7
Appendix II : Protection Features......................... 8
Appendix III : BMS Control Option...................... 10
Other Relevant Documents:
- MWS Applications Manual
- Specifications Sheet (model specific)
- R32 Handling : Water Heating Units

1. GENERAL

1.1 Introduction
Follow these instructions to ensure optimum performance,
reliability and durability of the unit.
Units must be installed in accordance with all national
and regional regulations and bylaws (eg AS/NZS 3500.4,
AS 3498 or G12/AS2 of the NZ Building Code for
Legonella protection).

2. INSTALLATION

2.1 Positioning
! WARNING
The appliance should be located in an area where
leakage of the unit or connections will not result in
damage to the area adjacent to the appliance or to lower
floors of the structure. When such locations cannot be
avoided, it is recommended that a suitable drain pan,
adequately drained, be installed under the appliance.
! WARNING
Keep appliance area clear and free from combustible
materials, gasoline and other flammable vapours and
liquids.
MWS units are designed to be located outdoors and
as close to the hot water storage tank area as acoustic
criteria allows.
Refer to figure 1 and in supplied Specifications sheet for
minimum clearances. If multiple units are to be placed
side-by-side then allow at least 1m between coil faces.
When determining the position of the unit, allow adequate
space around the unit to facilitate water pipe connections,
future servicing and maintenance (Fig.1). Ensure there
is enough working space in front of the electrical access
panel.
MWS models (c/w UC8) R32
Installation & Maintenance
Page
National Health and Safety regulations must be followed
to avoid personal injuries.
The appropriate permits must be acquired & adhered to.
Seismic restraints must be fitted if required.
The accompanying 'R32 Handling' pamphlet forms part of
these Installation & Maintenance instructions.
! WARNING.
These units use R32 refrigerant (Class A2L) which is
mildly flammable.
The unit shall be installed, operated and stored in a
adequately ventilated space (eg outdoors) where there is
no continuously operating open flames (eg an operating
gas appliance) or other R32 ignition source. If the
refrigerant gas comes into contact with fire, a poisonous
gas may occur. Be aware that R32 does not contain an
odour.
1.2 Site Preparation
IMPORTANT. System designers and installers must first
familiarise themselves with the contents of the MWS
Applications Manual prior to installing any unit. This
contains important information about site requirements
that will ensure the unit performs to its design capabilities.
Available at www.temperzone.biz; model search 'MWS'.
Note: The discharge air from the unit is very cold when
the unit operates in cooler conditions, and may be well
below the freezing temperature. Take care in selecting the
installation position that the exhaust air from the unit is
not under a window or plants that are cold sensitive. It is
also possible to get increased condensation on surfaces
above the unit exhaust air which may deteriorate some
surfaces. Avoid installations where ponding of chilled air
is likely to occur. Choose a well-ventilated location.
2.2 Plant Room
Where an indoor installation is desired, sufficient
ventilation must be provided to maintain the internal
air temperature no lower than 5°C below the external
ambient air temperature. It is possible to duct the exhaust
air from the unit, however the static at the fan must be
less than 25 Pa. It is recommended that an additional in-
line fan be installed to maintain airflow through the unit.
2.3 Mounting
The unit should be fastened to a firm flat raised horizontal
base using the holes supplied in the mounting channels
and thin isolation pads.
The unit must be installed level to ensure water drains
freely out the drain exits (refer 2.4)
The unit is shipped with blocks installed under the
003-000-232 09/23