Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53370001-01
Printed in U.S.A.
Form 37HS-10SI
Pg 1
8-18
Replaces: 37HS-1SI
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unit Identification . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Precautions . . . . . . . . . . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unit/Ceiling Coordination . . . . . . . . . . . . . . . . . . . . 8
Unit-to-Unit Connections . . . . . . . . . . . . . . . . . . . . 8
Unit Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
• T-BAR SUPPORT
• OTHER SUPPORTS
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
• T-BAR CEILING
• TEGULAR CEILING
• NON-ACCESSIBLE CEILINGS
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• GENERAL
• CONTROL ARRANGEMENTS
• OPERATING SEQUENCES
• CONTROL INSTALLATION
• AIRFLOW ADJUSTMENT
• FUNCTIONAL CHECKOUT
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Principles of Operation . . . . . . . . . . . . . . . . . . . . . 30
• GENERAL
• CONSTANT VOLUME OPERATION
• VARIABLE AIR VOLUME OPERATION
Preliminary System Check . . . . . . . . . . . . . . . . . . 30
Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
• GENERAL CHECKOUT
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Gaining Access to Control Area . . . . . . . . . . . . . 30
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 31
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Checking for Obstruction . . . . . . . . . . . . . . . . . . . 31
Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . . . 31
To Check Duct Pressure . . . . . . . . . . . . . . . . . . . . 31
SAFETY CONSIDERATIONS
Air-handling equipment will provide safe and reliable service
when operated within design specifications. The equipment
should be operated and serviced only by authorized personnel
who have a thorough knowledge of system operation, safety
devices and emergency procedures.
When installing this unit, observe precautions in the literature,
tags and labels attached to the equipment, and any other safety
precautions that may apply.
See Fig. 1 for Proposition 65 warning label.
Fig. 1 — Proposition 65 Warning Label
INTRODUCTION
Moduline
®
units are integral diffuser air terminals. They are
available with various control devices for constant volume
and variable volume heating and cooling applications.
All units consist of a plenum, valve assembly and diffuser. A
typical unit is shown in Fig. 2. The plenum is thermally and
acoustically insulated and contains a distribution baffle to
provide well-distributed flow to the valve assembly. Figure 3
shows a cross section of a typical 37HS unit.
The valve assembly includes the bellows, which is inflated in
proportion to the duct pressure to regulate airflow to the
space. The bellows is constructed of durable polyurethane.
The assembly is connected at either end to
1
∕
4
-in. OD control
tubing.
The diffuser assembly is available in a 2-slot, one-way or 2-
way blow configuration. A 3-slot director diffuser is available
for use in cooling/heating applications.
The standard diffuser assembly is not removable. Control ac-
cess is made through a ceiling opening (e.g., a removable
ceiling tile) or nearby light fixture. The 37HS Moduline ter-
minal is also available with a removable diffuser for installa-
tion in non-accessible ceilings.
Fig. 2 — Typical 37HS Moduline Air Terminal
!
WARNING:
Cancer - www.P65Warnings.ca.gov
VALVE
ASSEMBLY
PLENUM
CENTER
DIFFUSER
SIDE DIFFUSERS
37HS
Moduline
®
Air Terminals
