Detroit-radiant-products-company QTD Series Manuel d'utilisateur télécharger pdf (Page 32)

QTD Series

3.0 Installation • Electrical Requirements • Internal Wiring Diagrams

Before ﬁeld wiring this appliance - Check existing wiring; replace if necessary.

NOTE: If any of the original wire supplied with the appliance must be replaced, it must be replaced with

wiring material having a temperature rating of at least 105° C.

Figure 3.23 • Internal Block Wiring Diagram

DPDT SWITCH

(24V I/O)

120V/24V

TRANSFORMER

LINE VOLTAGE

120VAC 60Hz

POST-PURGE

TIMER

BLOWER

MOTOR

NEUTRAL

FAN

RELAY

DUAL POLE

RELAY

24VAC

CONTROL WIRES

PRESSURE

SWITCH

TWO-STAGE

GAS VALVE

FLAME SENSOR &

SPARK IGNITOR

FLAME SENSOR &

SPARK IGNITOR

HIGH-FIRE

RELAY

HIGH

FIRE

LOW

FIRE

W (24V IN)

(24V IN) R

GND

CIRCUIT BOARD

DIAGNOSTIC

LIGHT

BKBK

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 43 44

QTD Series 1
Installation Manual 1
Contents 2
1.0 Introduction 3
Rear Panel 4
- 120V HEATER INPUT 5
2.0 Safety 6
Applications 7
Clearance to Combustibles 8
3.0 Installation 10
Heater Packaging 12
DETAIL ‘A’ 13
DETAIL ‘B’ 13
Preparing Points for Hanging 15
Hanging Pre-Assembled Unit 16
Final Check List 17
Venting Requirements 18
Unvented Operation 19
Sidewall Venting 20
Rooftop Venting 22
Common Venting 23
Combustion Air Requirements 24
Guidelines: 25
Gas Supply 26
To connect the gas: 27
Electrical Requirements 29
Thermostat 29
CIRCUIT BOARD 32
4.0 Operation 34
Sequence of Operation 35
5.0 Maintenance 36
Routine Inspection 42
Kit Contents Check List 44
Approvals 44
Limited Warranty 44

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