IM 907 / Page of 4
General Information .............................................................2
Safety Information ................................................................3
Inspection ................................................................. 3
Installation .........................................................................4-8
Special Precautions .................................................. 4
Locating Unit Heaters .............................................. 4
Unit Heater Mounting Height .................................. 5
Deflector Mounting
.................................................. 6
Unit Suspension ....................................................... 6
Suggested Piping Arrangements
Hot Water Systems ................................................... 7
Steam Systems (UHH-18 through 86) ..................... 7
Steam Systems (UHH-108 through 340) ................. 7
Piping .................................................................................8
Wiring .................................................................................9
Prior to Operation..................................................... 9
Initial Start-up .......................................................... 9
Automatic Control ................................................................9
Control Sequences.................................................... 9
Operation .........................................................................9-10
Prior to Operation..................................................... 9
Initial Start-up .......................................................... 9
Performance Data ..........................................................10-13
Model UHH & UDH Motor Data & Power Codes 10
Model UHH - (Steam) High Motor Speed ..............11
Model UHH - (Steam) Reduced Motor Speed ........11
Model UHH - (Hot Water) High Motor Speed ...... 12
Model UHH - (Hot Water) Reduced Motor Speed 12
Model UDH - (Steam) High Motor Speed ............. 13
Model UDH - (Hot Water) High Motor Speed ...... 13
Building or Room Sound Zones ........................................14
Dimensional Data ..........................................................15-16
Model UHH............................................................ 15
Explosion Proof Horiz. Model UHX Dimensions . 16
Model UDH............................................................ 17
Explosion Proof Vert. Model UDX Dimensions .... 19
Service Diagnosis ...............................................................19
Maintenance ...................................................................20-21
Service Checklist.................................................... 21
Replacement Parts Information ........................................22
Table of Contents
General Information
This manual covers proper installation and service for
standard horizontal and vertical air flow units. Unit
heaters should be installed following directions in this
manual for proper performance and application to terms
and conditions of manufacturer’s warranty.
Units are approved for use with water or steam up to 150
psig at 375°F. Maximum steam or hot water temperatures
for explosion-proof units is 329°F or 87 psi.
All unit external wiring must conform to applicable
current codes and to the National Electric Code
ANSI/NFPA No. 70-1999 or the latest edition. In
Canada, all external wiring must conform to the
Canadian Electric Code, Part 1 CSA Standard C22.1.
Standard horizontal units are suited for air throw over
general-use areas.
Vertical units are mounted near high ceilings with
vertical projection to mix air and eliminate temperature
stratification.
Steam must enter the unit at the top header and
condensate removed at the lower header. Hot water
supply should be at the bottom header and return at the
top header, keeping the element filled and removing
entrained air through the top of the unit.
Model numbers correspond to Mbtu/hr. output at 2 psig
steam with 60°F entering air. A model 63 will deliver
63,000 Btu/hr. at 2 psig with 60°F entering air.
CAREFULLY FOLLOW THE INSTALLATION
PROCEDURES GIVEN IN THIS MANUAL
FAILURE TO INSTALL AS SHOWN WILL VOID
ALL WARRANTIES.
Содержание UHH
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