Powrmatic HEM-SL Series User Manual

page no. 17 of 48
HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
Before installation, check that the:
- local distribution conditions, nature of gas and pressure,
and the current state adjustment of the appliance are
compatible,
- local electrical supply conditions are compatible with the
electrical data given on the data plate.
2.1.1. Unpacking
The module has been red and tested at the factory prior
to despatch. Check the despatch documents and the data
plate axed to the module to conrm that it is as ordered
and compatible with the gas and electrical supplies on site.
Read the entire document before commencing installation.
2.1.2 Module Types
Modules are available for:
a) Use within an additional casing e.g. an air handling unit.
i.e no factory tted burner /controls housing.
b) Internal use with a burner /controls housing.
c) For external use with a weatherproof burner/controls
housing.
Type a) and type b) can be for either B22 (combustion air
taken from the internal space) or C12/C32 (combustion air
taken from outside) ue congurations.
2.1.3 Module Fitment
Modules must be handled safely and lifted using the tted
lifting brackets. These can be removed on installation if
necessary. The module should slide into the air handling
unit/duct section between top and bottom guide rails
sized to suit the module in question. It must be possible
to easily remove the module at a later date should this be
necessary.
There must be eective sealing between the module
burner/controls section so that there is no air leakage from
the main air ow path into the burner/controls section.
Modules may be orientated so that the burner manifold(s)
is vertical or horizontal.
For external units please note:
The lowest edge of air inlets must be at least
500 mm above ground level. Access panels
and doors to be removed during normal
servicing shall be designed so that repeated removal and
replacement does not damage the insulation or impair the
waterproong of the unit.
No opening (e.g. electrical wiring points) from the inside of
the appliance to the outside air shall permit the entry of a
16 mm diameter ball.
2.1.4 Combustion Air Inlet and Flue Products Outlet
Combustion air inlet(s) and ue outlets must be connected
to each HEM unit so when the unit is installed, their
termination is at least 500mm from ground level.
2.1.4.1 Type B Flued Installations
The combustion air inlet attachment requires an aperture
to be cut and four pilot holes to be drilled in the front plate
of the controls compartment to the following dimensions
and must be installed on a level plane.
220
96
12
12
40.5
40.5
4 HOLES Ø3
The combustion air inlet attachment can then be oered
up to the front plate and secured using self tapping screws
ensuring a positive seal to prevent any ingress of water.
Alternatively an air inlet orice having a free area of at
least 110 cm² (app 105 x 105mm) can be cut into the burner
enclosure panel to facilitate the combustion air.
Two air inlet attachments (or free area of 220cm²)
are required on models SL75-15; SL90-18; NVx &
SL125; NVx & SL50; NVx & SL175 and NVx & SL200
A ue outlet terminal is required with every module and
is connected to the exhaust fan. Flue outlet terminals can
be either standard 450mm long terminals or Powrmatic
approved ue system. Flue terminals may be extended by
the use of a Powrmatic approved ue piece with sealing
ring or cut down to suit the particular application ensuring
the ue terminal projects from the front plate by at least
75mm
min 75mm
2.1 Fitting the Unit

Powrmatic HEM-SL Series Specifications

General

Brand	Powrmatic
Model	HEM-SL Series
Category	Control Unit
Language	English