ClimateMaster DC Series Installation Manual download pdf (Page 8)

Residential H&V - 60Hz R22 &R410A

Rev.: 22 Dec, 2008

Water-Source Heating and Cooling Systems

*3/4" IPT

Trap Depth

1.5" [38mm]

Min 1.5"

[38mm]

1/4" per foot

(21mm per m)

drain slope

3/4" PVC or

Copper by others

Rev.: 10/26/06D

Vent (below top of

drain line)

* Some units include a painted drain

connection. Using a threaded pipe or

similar device to clear any excess paint

accumulated inside this fitting may

ease final drain line installation.

Figure 6: Horizontal Condensate Connection

Horizontal Installation

CAUTION! Ensure condensate line is pitched toward

drain 1/4” per foot [21mm per m] of run.

Condensate Piping – Horizontal Units

Pitch the unit toward the drain as shown in Figure 2 to

improve the condensate drainage. On small units (less

than 2.5 tons/8.8 kW), insure that unit pitch does not cause

condensate leaks inside the cabinet.

Install condensate trap at each unit with the top of the trap

positioned below the unit condensate drain connection as

shown in Figure 6. Design the depth of the trap (water-seal)

based upon the amount of ESP capability of the blower

(where 2 inches [51mm] of ESP capability requires 2 inches

[51mm] of trap depth). As a general rule, 1-1/2 inch [38mm]

trap depth is the minimum.

Each unit must be installed with its own individual trap and

connection to the condensate line (main) or riser. Provide

a means to ﬂ ush or blow out the condensate line. DO NOT

install units with a common trap and/or vent.

Always vent the condensate line when dirt or air can collect

in the line or a long horizontal drain line is required. Also vent

when large units are working against higher external static

pressure than other units connected to the same condensate

main since this may cause poor drainage for all units on the

line. WHEN A VENT IS INSTALLED IN THE DRAIN LINE, IT

MUST BE LOCATED AFTER THE TRAP IN THE DIRECTION

OF THE CONDENSATE FLOW.

 CAUTION! 

Duct System Installation

The duct system should be sized to handle the design

airﬂ ow quietly. Refer to Figure 3 for horizontal duct system

details or ﬁ gure 8 for vertical duct system details. A ﬂ exible

connector is recommended for both discharge and return

air duct connections on metal duct systems to eliminate

the transfer of vibration to the duct system. To maximize

sound attenuation of the unit blower, the supply and return

plenums should include internal ﬁ berglass duct liner or be

constructed from ductboard for the ﬁ rst few feet. Application

of the unit to uninsulated ductwork in an unconditioned

space is not recommended, as the unit’s performance will be

adversely affected.

At least one 90° elbow should be included in the supply

duct to reduce air noise. If air noise or excessive air ﬂ ow is

a problem, the blower speed can be changed. For airﬂ ow

charts, consult speciﬁ cations catalog for the series and

model of the speciﬁ c unit.

If the unit is connected to existing ductwork, a previous

check should have been made to insure that the ductwork

has the capacity to handle the airﬂ ow required for the unit.

If ducting is too small, as in the replacement of a heating

only system, larger ductwork should be installed. All existing

ductwork should be checked for leaks and repaired as

necessary.

DUCT SYSTEM INSTALLATION

Section 10 - Packaged IOM 8 4/24/09 3:16:49 PM

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ClimateMaster DC Series Installation Manual Page 8

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