BRD08-20 Horizontal Economizer (HBREP) Installation Instructions

BRD08-20 Horizontal Economizer (HBREP) Installation Instructions
INSTALLATION INSTRUCTIONS
MODULATING HBREP ECONOMIZER
010-225002-024 / 010-225002-048
Economizers are used with 2-5 ton units for
automatic sensor-controlled introduction of
outdoor air into the system through an
electro-mechanically controlled damper.
Part#
Unit Model
010-225002-024
24/36 HBREP
010-225002-048
48/60 HBREP
Step 1:
Check for correct number of parts. See list below.
1 ea. - Economizer Assembly
1 ea. - Bag Hardware
Figure 1
Step 2:
Disconnect all power to unit.
Step 3:
Remove return air access panel from unit and rear
access panel(s) if applicable as shown in Figure
2.
RETURN AIR ACCESS PANEL
Figure 2
Step 4:
Center Economizer assembly over return
opening. Slide economizer assembly fully into unit
and secure with the supplied #10 - 16 x ½ screws.
See Figure 3.
Figure 3
INSTALLATION INSTRUCTIONS
MODULATING HBREP ECONOMIZER
010-225002-024 / 010-225002-048
Step 5:
Relocate mixed air sensor (See Figure 4) to near
the blower inlet. Route wire through unit to
terminal block by damper motor.
Step 6:
If the barometric relief is to be installed cut a A" x B"
hole in the return air duct near Economizer. See
Figure 5.
CONTROLS ACCESS
Figure 4
ECONOMIZER
Step 7:
Secure pressure relief damper near Economizer
over hole in return air duct using (4) screws. See
Figure 6.
CUT OPENING A" x B"
Step 8:
Replace all panels and restore power to the unit.
RETURN DUCT
Figure 5
BAROMETRIC RELIEF
SUPERSEDES 04-11-06
JULY 2, 2007
Figure 6
MAIHE01
HARNESS DETAIL
COMPONENT CODE
C7150B
C7400A
M7415A
T
W7459A
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24v
Transformer
Logic Module
Revision
WIRE COLOR CODE
BLK
BRN
GRN
VIO
YEL
Notes:
1. Unit wiring shown as reference only. Check unit wiring for actual unit wiring.
2. Relays 1K and 2K actuate when the Outdoor Air Enthalpy is higher than the Return Air Enthalpy.
3. 1S is an electronic switch which closes when powered by a 24 VAC input.
4. Factory installed resistor should be removed only if C7400 differential enthalpy sensor is added.
Black
Brown
Green
Violet
Yellow
BLU
GRA
ORN
WHT
A
Change
Added Ground Wire
Date
10-10-05
Blue
Gray
Orange
White
Modulating Horizontal Economizer
for 024-060 HBREP Magic Air Unit
Magic Aire
501 Galveston Street
Wichita Falls, TX 76301
Phone (940) 397-2100
Fax
(940) 397-2166
Date: October 10, 2005
Supercedes: 08-01-05
Drawn by:
Unit # 010-225002-***
Diagram# 32401W
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