Technical data

Page 6
Corrosive system water requires
corrosion-resistant fittings and hoses and may require
water treatment.
Condensate Piping
Units are typically installed directly above each other on
successive floors with condenste drains located near the
units.
Connect the unit condensate drain connection to the
building condensate drain with a flexible, non-pressure-
rated 3/4 inch ID plastic hose. Ensure the hose is without
kinks to maintain an unobstructed flow of condensate
from the unit to the drain.
The horizontal run of a condensate hose is usually too
short to cause drainage problems, however, the
horizontal run of the condensate line should be pinched
at least 1 inch for every 10 feet of run in the direction of
flow. Avoid low points and unpitched piping since dirt
collects in low or level areas and may cause stoppage and
overflow.
Install a condensate trap at each unit with the top of the
trap positioned below the unit condesate drain
connection.
The installation of Horizontal and Vertical 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.
Installation of Supply and Return Piping
Piping must comply with all applicable codes.
Follow these piping guidelines.
1. Install a drain valve at the base of each supply and
return riser to facilitate system flushing.
2. Install shut-off/balancing valves and unions at each
unit to permit unit removal for servicing.
3. Place strainers at the inlet of each system circulating
pump.
4. Select the proper hose length to allow slack between
connection points. Hoses may vary in length by +2%
to -4% under pressure.
5. Refer to Table 1. DO NOT exceed the minimum
bend radius for the hose selected. Exceeding the
minimum bend radius may cause the hose to
collapse, which reduces water flow rate. Install an
angle adapter to avoid sharp bends in the hose when
the radius falls below the required minimum.
Maximum allowable torque for brass fittings is 30 foot-
pounds. If a torque wrench is not available, tighten
finger-tight plus one quarter turn. Tighten steel fittings as
necessary.
Ensure the trap is filled with water before operating the
unit to avoid condensate pan overflow at initial start-up.
DO NOT bend or kink supply lines or hoses.
Optional pressure-rated hose assemblies designed
specifically for use with ClimateMaster units are
available. Similar hoses can be obtained from alternate
suppliers. Supply and return hoses are fitted with swivel-
joint fittings at one end to prevent kinking during
installation.
Refer to Figure 4 for an illustration of a Supply/Return
Hose Kit. Male adapters secure hose assemblies to the
unit and risers. Install hose assemblies properly and
check them regularly to avoid system failure, reduced
service life and possible damage to surrounding furniture
and carpets.
INSTALLATION
Table 1. Metal Hose Minimum Bend Radii
Minimum Bend Radius
2-1/2
4-1/2
5-1/2
6-3/4
Hose in Inches
1/2
3/4
1
1-1/4
Insulation is not required on loop water piping except where
the piping runs through unheated areas or outside the
building. Because loop temperature is normally between
60°F and 90°F, piping will not sweat nor suffer heat loss in
normal ambient conditions. (HS/VS and HL,HP/VL,VP
may require insulation if loopwater temperature drops
below the dew point.)
Pipe joint compound is not necessary when Teflon threaded
tape is pre-applied to hose assemblies or when flared-end
connections are used. If pipe joint compound is preferred,
use compound only in small amounts on the male pipe
threads of the fitting adapters. Prevent sealant from reaching
the flared surfaces of the joint. Note: When anti-freeze is
used in the loop, assure it is compatible with Teflon tape
or the pipe joint compound used.
Figure 4. Supply/Return Hose Kit
Rib Crimped
Length
(2 Foot Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
MPT
▲ CAUTION
!
▲ CAUTION
!