Quick Start Manual
9
Installation, Operation & Maintenance  HTV/HTD/HTH SERIES  Heat Controller, Inc.
Vertical Installation
Figure 7: Vertical Unit Mounting
Figure 8: Typical Vertical Unit Installation Using Ducted 
Return Air
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Flexible canvas duct
connector to reduce
noise and vibration
Use turning vanes in
supply transition
Internally insulate supply
duct for first 1.2 m each way
to reduce noise
Internally insulate return
transition duct to reduce
noise
Rounded return
transition
Rev.: 6/2/09S
Vertical Unit Location
Units are not designed for outdoor installation. Locate the unit in 
an INDOOR area that allows enough space for service personnel 
to perform typical maintenance or repairs without removing unit 
from the mechanical room/closet. Vertical units are typically 
installed in a mechanical room or closet. Never install units in 
areas subject to freezing or where humidity levels could cause 
cabinet condensation (such as unconditioned spaces subject to 
100% outside air). Consideration should be given to access for 
easy removal of the fi lter and access panels. Provide suffi cient 
room to make water, electrical, and duct connection(s). 
If the unit is located in a confi ned space, such as a closet, 
provisions must be made for return air to freely enter the space 
by means of a louvered door, etc. Any access panel screws that 
would be diffi cult to remove after the unit is installed should 
be removed prior to setting the unit. Refer to Figures 7 and 8 
for typical installation illustrations. Refer to unit specifi cations 
catalog for dimensional data.
1. 
  Install the unit on a piece of rubber, neoprene or other 
mounting pad material for sound isolation. The pad should 
be at least 3/8” [10mm] to 1/2” [13mm] in thickness. Extend 
the pad beyond all four edges of the unit.
2.  Provide adequate clearance for fi lter replacement and drain 
pan cleaning. Do not block fi lter access with piping, conduit 
or other materials. Refer to unit specifi cations for dimensional 
data. 
3.  Provide access for fan and fan motor maintenance and for 
servicing the compressor and coils without removing the unit.
4.  Provide an unobstructed path to the unit within the closet 
or mechanical room. Space should be suffi cient to allow 
removal of the unit, if necessary.
5.  Provide access to water valves and fi ttings and screwdriver 
access to the unit side panels, discharge collar and all 
electrical connections.
Downfl ow units may be installed directly on the fl oor. The 
optional internal electric heat is rated for zero clearance to 
combustible materials.
The installation of water source heat pump units and all 
associated components, parts and accessories which make 
up the installation shall be in accordance with the regulations 
of ALL authorities having jurisdiction and MUST conform to 
all applicable codes. It is the responsibility of the installing 
contractor to determine and comply with ALL applicable codes 
and regulations.










