Modine PDP150LP Manual de Instruções descarregar pdf (Página 15)

6-560.4

CONTROL OPERATING SEQUENCE / UNIT COMPONENTS

Upon a call for heat from the thermostat, power is supplied to

the power exhauster motor. The unit will go through a purge

period and then the direct spark igniter will be energized. At the

same time, the main valve in the combination control valve will

open to allow gas to flow to the burners. If the fan motor has

not already started it will start shortly. If a flame is not sensed

within 7 seconds for any reason the main valve will close and

there will be a short purge period before ignition is tried again.

If the flame is not sensed after four tries there will be at least a

one hour wait before ignition is tried again.

CONTROL OPERATING SEQUENCE

Figure 15.1 - Major Gas, Electrical Service, Safety

and Other Components

1. Power Exhauster

2. Pressure Switch

3. Integrated Direct Spark

Control Board

4. Combination Gas Control

5. Control Transformer

6. Flame Sensor (hidden)

7. Auto Reset Limit Control (hidden)

8. Direct Spark Igniter (hidden)

9. Gas Pipe Connection

10.HorizontalAirDeectorBlades

Table 15.1 - Gas Controls - All Models

Table 15.1 - Propeller Unit Model PTP General Performance Data

 Ratings shown are for elevations up to 2,000'. For

elevations above 2,000', ratings should be

reduced at the rate of 4% for each 1,000' above

sea level. (In Canada see rating plate.) Reduction

of ratings requires use of a high altitude kit.

 Data taken at 55°F air temperature rise. At 65°F

ambientandunitredatfull-ratedinput.Mounting

height as measured from bottom of unit, and

withoutdeectorhoods.Forunitsequippedwith

deectorhoods,seepage16.

 All motors used are produced, rated and tested by

reputable manufacturers in accordance with

NEMA standards and carry the standard warranty

of both the motor manufacturer and Modine. All

motors are totally enclosed and all single phase

motors have built-in thermal overload protection.

GENERAL PERFORMANCE DATA - MODEL PTP

Model PTP Sizes

150 175 200 250 300 350 400

Btu/Hr Input ➀

150,000 175,000 200,000 250,000 300,000 350,000 400,000

Btu/Hr Ouput ➀

120,000 140,000 160,000 200,000 240,000 280,000 320,000

Entering Airflow (CFM) @

70°F

2140 2725 2870 3995 4545 5280 5995

Outlet Velocity (FPM)

711 607 643 721 824 748 851

Air Temp. Rise (°F)

53 48 52 47 50 50 51

Max. Mounting

Height (Ft.) ➁

15 14 15 18 19 18 21

Heat Throw (Ft.) (@

Max Mtg Ht)

51 50 53 62 69 65 74

Motor Type ➂

PSC PSC PSC PSC PSC PSC PSC

Motor HP

1/6 1/6 1/3 1/3 1/2 1/2 3/4

Motor RPM

1075 1075 1075 1075 1075 1125 1125

Control System Description

Gas

Type

Control

Code

Control

Voltage

Service

Voltage

Single-Stage, Direct Spark

Ignition, 100% Shut-off with

Continuous Retry

Utilizes a single-stage

combination gas control with

ignition control.

Gas is lit with a direct spark

igniter on call for heat.

Natural 11

24V 115V

Propane 21

Two-Stage, Direct Spark

Ignition, 100% Shut-off with

Continuous Retry

Utilizes a two-stage combination

gas control with built-in ignition

control. Firing rate is 100% and

50% of full rated input. Gas is lit

with a direct spark igniter on call

for heat.

Natural 12

Propane 22

1 2 ... 10 11 12 13 14 15 16 17 18 19 20

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