WIRING SCHEMATIC FOR UNITS WITH

6-PIN CONNECTOR GCI-3A (23L53) CONTROL BOARD

BLUE

FLAME

MAXIMUM LOAD NOT TO EXCEEDSENSOR 20VA AT 24V, CLASS 2.

24V POWER (R)

A3

 

24VAC R

P20

HOT

 

F5

ONLY WITH

OPTIONAL THERMOSTAT INSTALLATION

IT IS RECOMMENDED TO USE 18AWG WIRE WHEN INSTALLING THE THERMOSTAT. CONNECT THERMOSTAT WIRING TO TERMINALS ‘R’ AND ‘W’ AS ILLUSTRATED ON

S18

COM BROWN

MANUAL FAN 5 PSWRTN G BLOWER (G)

THE SCHEMATIC DIAGRAM.

DISCONNECT ALL POWER

BEFORE SERVICING.

FOR PROPER GROUNDING,

REFER TO LOCAL CODES.

S10

 

 

DESCRIPTION

KEY

COMPONENT

A3

 

CONTROL, BURNER, IGNITION

B3

 

MOTOR, FAN

B6

MOTOR, COMBUSTION AIR BLOWER

6VI

 

VALVE, GAS

510

LIMIT, PRIMARY, GAS

518SWITCH, COMB, AIR BLWR PRONE

(1)S47 SWITCH-FLAME ROLLOUT 1

(2) S47

SWITCH-FLAME ROLLOUT 2

T1

TRANSFORMER CONTROL

L1 BLACK

N WHITE

EQUIPMENT

GROUND

 

 

 

RED

 

 

 

 

 

2

PSW

HEAT 1 (W1)

NOTE: IF ANY OF THE ORIGINAL WIRE AS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUT W

SUPPLIED WITH THE APPLIANCE MUST BE

 

 

ORANGE

 

 

 

 

 

 

 

 

 

 

 

REPLACED, IT MUST BE REPLACED WITH

 

 

 

 

 

 

 

1

HIL

 

 

WIRING MATERIAL HAVING A TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RTN

 

 

RATING OF AT LEAST 105°C.

 

 

 

 

 

 

 

BLUE

6

HIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUT

 

 

 

 

 

1(S47) 2(S47)

 

 

 

 

 

 

 

 

 

 

 

WARNING-

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC SHOCK HAZARD, CAN CAUSE INJURY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR DEATH, UNIT MUST BE GROUNDED IN ACCORDANCE

SPARK

 

 

 

 

 

 

 

 

 

 

 

 

WITH NATIONAL AND LOCAL CODES.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRODE

 

 

 

 

 

 

 

 

 

 

 

SET THERMOSTAT HEAT ANTICIPATION

 

 

 

 

 

 

 

YELLOW

3

VLV

 

 

ROBERTSHAW VALVE

.4

 

 

 

 

 

 

GV1

 

 

 

 

 

 

 

 

RTN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

VLV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUT

GND PROGRAMMABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMO.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND C

24V COMMON (C)

 

 

 

 

 

 

 

 

 

 

 

GREEN/YELLOW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRE DIAGRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS FIRED UNIT HEATER DSI-IGNITION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MHU45LP

MHU45NG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HSU45LP

HSU45NG

 

 

T1 24V

 

 

 

 

 

 

 

 

 

 

 

 

MHU75LP

MHU75NG

 

 

 

 

 

 

 

 

YELLOW

 

 

 

 

 

 

HSU75LP

HSU75NG

 

 

120V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE VOLTAGE FIELD INSTALLED

60006

REV.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLACK

 

 

 

 

 

 

WHITE

 

 

 

 

 

 

 

CLASS II 24 VAC FIELD INSTALLED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DENOTES OPTIONAL COMPONENTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CWB

HTG

 

 

 

 

 

 

 

 

ACB ACB

ACB

 

 

 

 

BLWR

ACC ACC ACC

LOW HEAT COOL

 

 

 

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(C

 

 

 

LADDER DIAGRAM

 

BLACK

 

 

 

WHITE

BLACK

 

 

 

 

 

WHITE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B6

 

 

 

 

 

 

 

 

 

OM)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Enerco Compact Unit Heater

14

Operating Instructions and Owner’s Manual

Page 14
Image 14
Enerco HSU 75, HSU 45 operating instructions Ladder Diagram

HSU 45, HSU 75 specifications

Enerco HSU 75 and HSU 45 are standout models in the realm of portable heating solutions, designed for efficiency and convenience. These units serve a range of applications, from construction sites to workshops, and even for personal use in outdoor settings. With their robust engineering and advanced features, they are ideal for anyone needing reliable warmth in cold conditions.

One of the main features of the Enerco HSU series is their impressive heating capacity. The HSU 75 offers a maximum output of 75,000 BTU, making it suitable for larger spaces, while the HSU 45 delivers 45,000 BTU, perfect for smaller areas. This flexibility allows users to choose the right model based on their specific heating needs.

Both models utilize a forced air heating system, which efficiently circulates warmth throughout the space. This technology ensures rapid heating, allowing for immediate relief from the cold, an essential feature in situations where time is of the essence.

Durability is another key characteristic of the HSU series. Constructed with heavy-duty materials, these units are built to withstand the rigors of demanding environments. The robust design makes them suitable for outdoor use, capable of enduring tough weather conditions without compromising performance.

Safety is paramount with Enerco heaters, and both the HSU 75 and HSU 45 come equipped with safety features such as automatic shut-off sensors and flame failure devices. These innovations give users peace of mind, knowing that the unit will operate safely even in unpredictable environments.

Portable design is a hallmark of these heaters, featuring built-in handles and a lightweight structure. This makes it easy for users to transport the units from one location to another, enhancing their versatility in use.

Finally, both models are compatible with various fuel sources, allowing for flexibility based on user preference and availability. Whether using propane or natural gas, users can enjoy efficient heating tailored to their requirements.

In conclusion, the Enerco HSU 75 and HSU 45 represent a perfect blend of power, safety, and portability. Their advanced features and durable build make them ideal companions for anyone needing dependable heat in diverse scenarios. With these units, warmth is always within reach, ensuring comfort regardless of the harshness of the outdoor conditions.