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Humidifier
HM750
Honeywell HM750 User Manual
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HM750A1000
5
33-00289—01
Fig. 2. Typical HM750 Installation.
Measurements in inches (mm).
240 VAC
M37185
36 (914)
MINIMUM
2 (51) SCREWS
MOUNTING
STEAM
DISTRIBUTION
CONTROLS
PLUMBING
ELECTRICAL
4 (102)
12 (305)
MAIN SUPPL
Y
L1
L2/N
GND
(OPTIONAL)
HOT
NEUTRAL
GROUND
MAIN SUPPL
Y
L1
L2/N
GND
(OPTIONAL)
OFF ON
HOT
HOT
GROUND
OFF ON
120 VAC
4 (102)
1 (25)
1 (25)
4 (102)
1 (25) IF WIRED BEFORE MOUNTING.
36 INCHES (914) FOR WIRING ACCESSIBILITY
240V
AC
120V
AC
HUMIDIPRO
H6062
AIR PROVING
(OR JUMPER)
24V
AC
COM
HUM
HUM
AP
AP
Air Proving
Humidistat
1
1
THERMOSTAT OR HUMIDISTAT
3/4 (19) OD
1/4 LDPE
OR COPPER
WATER LINE
ALWAYS INSTALL
A WATER
SHUT-OFF VALVE.
USE 1/2 IN. OD COPPER
TO WITHIN 4 FT (1.2 M)
OF HUMIDIFIER.
AIR PROVING JUMPER COMES
PRE-INST
ALLED. REMOVE JUMPER
IF AIR PROVING IS UTILIZED.
4
6
Table of Contents
Installation Instructions
1
Tools Needed
1
Included in the Box
1
Before Installation
1
Specifications
2
Warnings
2
Parts and Accessories
3
How the Humidifier Works
3
Sizing
4
AHRI Recommended Humidity Table
4
Steam Humidifiers Necessary for Application
4
Typical HM750 Installation Diagram
5
Location
6
Steam Nozzle Location
6
Steam Line Instructions
7
Main Rules for Atmospheric Steam Lines
7
Steam Distributor Nozzle
7
Molded Steam Guide Diagram/Minimum Slope Requirements for Steam Line
7
Steam Line Installation Examples
8
Mounting the Humidifier
9
Mounting to a Wall
9
Mounting with Keyholes
9
Mounting to the Supply Duct
10
Remove the Steam Guide
10
Prepare the Steam Nozzle
10
Install the Stam Nozzle
10
Plumbing
11
Connecting the Water Supply Line/Drain Line
11
Proper Drain Hose Routing Diagram
11
Electrical
12
Voltage Selection
12
Connecting Power/Requirements
12
Wiring Procedure
12
Low-Voltage Controls/Requirements/Wiring Procedure
13
Fan Interlock Wiring with Humidipro
13
Wiring the Steam Humidifier with a Digital Thermostat Diagram
13
Wiring the Steam Humidifier with a Mechainical Thermostat Diagram
14
Start up
15
Installation Check
15
Operation
16
LED Status Lights
16
Selecting a Relative Humidity Setpoint
16
Main Button
16
Humidifier Components Diagram
17
Required Maintenance
18
Extended Shutdown
18
Replacement Parts
19
Cylinder Spent Fault
19
Cylinder Replacement Kit
19
Removing the Cylinder
20
Drain Valve Removal (for Cleaning or Replacement)
21
Drain Valve Components Diagram
21
Control Board Replacement
22
Inlet Valve Strainer Cleaning
22
Opening Electrical Compartment
22
Inlet Valve Replacement
23
Troubleshooting
24
Fault Codes Diagram
27
Warranty
28
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Honeywell HM750 Specifications
General
Control
Automatic
Voltage
120V
Speeds
Variable
Tank Capacity
N/A (direct water supply)
Run Time
Continuous operation
Humidistat
Included
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