BRD08-20 Upflow Economizer (UBREP) Installation Instructions

BRD08-20 Upflow Economizer (UBREP) Installation Instructions
INSTALLATION INSTRUCTIONS
MODULATING UBREP ECONOMIZER W/ RELIEF
010-225001-024 / 010-225001-048
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
010-225001-024
24/36 UBREP-C
010-225001-048
48/60 UBREP-C
SHIPPING SCREWS
Step 1:
Check for correct number of parts. See list below.
1 ea. - Economizer Assembly
1 ea. - Bag Hardware
Figure 1
Note:
Shipping screws must be removed from each corner of
the blade prior to installation.
Step 2:
Disconnect all power to unit.
RETURN AIR ACCESS PANEL
Figure 2
Step 3:
Remove return air access panel from unit and rear
access panel(s) if applicable as shown in Figure 2.
Step 4:
Slide Economizer assembly into unit over return
opening, but DO NOT insert completely into unit. See
Figure 3. Connect low and high voltage wiring to the
terminal block and transformer per wiring diagram.
Figure 3
INSTALLATION INSTRUCTIONS
MODULATING UBREP ECONOMIZER W/ RELIEF
010-225001-024 / 010-225001-048
Step 5:
Relocate mixed air sensor (See Figure 5) to near the
blower inlet.
Step 6:
Slide economizer assembly fully into unit and secure
with the supplied #10 - 16 x ½ screws. See Figure 4.
Figure 4
MIXED AIR SENSOR (RELOCATE)
Note:
Ensure proper clearance in the return duct for full
damper blade movement. See Figure 5.
BLADE IN FULLY OPEN POSITION
Step 7:
Replace all panels and restore power to the unit.
BLADE IN FULLY CLOSED POSITION
Side View w/ Blade Positions - Figure 5
SUPERSEDES 11-21-05
JULY 2, 2007
MAIEC02
HARNESS DETAIL
COMPONENT CODE
C7150B
C7400A
M7415A
W7459A
T
TB-11
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24v
Logic Module
Transformer
Terminal Board
Revision
WIRE COLOR CODE
BLK
BRN
GRY
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
Gray
Violet
Yellow
BLU
GRN
ORN
WHT
A
Change
Added Ground Wire
Date
10-10-05
Blue
Green
Orange
White
Modulating Economizer w/ Relief
for 024-060 UBREP-C 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: 07-12-05
Drawn by:
Unit # 010-225001-***
Diagram# 42401W
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement