Orion-system MODGAS-XWR Manuel d'utilisateur télécharger pdf (Page 3)

MODGAS-XWR Technical Guide

OVERVIEW

General Information

YS102530 REV 1

GAS VALVE 2

GAS VALVE 1

PO-IGN2

PO-IGN1

COMMON

RLY4

RLY3

RLY2

RLY1

WATTMASTER

CONTROLS

MADE IN USA

AUX BIN

HEAT EN

RESET IN

OPTIONS

SAT

GND

AUX AIN

GND

STATUS

ALARM

COMM

POWER

ANODE

ENTER

DOWN

ALARM

OE377-26-00060

MODGAS-XWR

AAON No.: V20780

WattMaster No:

#SW000055

Rev.: 1A

E-BUS

CONNECT

I2C

CONNECT

+24 VAC

GND

CONTACT RATING

IS 1 AMP MAX

@ 24 VAC

HEAT 1

LOW SPEED

FAN

PROOF OF IGNITION 1

PROOF OF IGNITION 2

GAS VALVE 2

GAS VALVE 1

GAS VALVE

TERMINALS

HEAT 2

COMMON

RELAY OUTPUT

TERMINALS

INPUT TERMINALS (TYPE)

HEAT ENABLE (BI)

AUX. (BI)

GND

RESET INPUT (AI)

SAT INPUT (AI)

GND(AI)

GND

AUX. (AI)

www.aaon.com

MODGAS-XWR CONTROLLER

(OE377-26-00060)

Figure 1: OE377-26-00060 MODGAS-XWR Controller

Features

The MODGAS-XWR Controller provides the following:

• Can control two (2) Gas Valves using input from

Proof of Ignition Modules

• Up to four (4) MODGAS-XWR Modules can be daisy-

chained together to control up to eight (8) Modulation Gas

Valves

• Monitors Supply Air Temperature and Supply Air Reset

and modulates gas valves to maintain Setpoint

• Provides active relays to control the Fan and

Heat Stages

• Contains a 2 x 8 LCD character display and 4 buttons

that allow for status display, setpoint changes, and

conﬁ guration changes

NOTE: The MODGAS-XWR Controller contains no user-

serviceable parts. Contact qualiﬁ ed technical personnel

if your MODGAS-XWR Controller is not operating

correctly.

Overview

The OE377-26-00060 MODGAS-XWR Controller (AAON Part No.

V20780) is designed to modulate up to two (2) gas valves to maintain

a desired Discharge Air Temperature. The MODGAS-XWR Control-

ler also controls the speed of the induced draft fan to maintain proper

combustion in the heat exchanger. See Figure 1.

The controller can be used as a stand-alone unit or be connected to

a VCM-X E-BUS Controller (OE332-23E-VCMX; AAON Part No.

V07150), VCB-X Controller (OE335-26B-VCBX; AAON Part No.

V28940), VCC-X Controller (OE338-26B-VCCX; AAON Part No.

V42430), or 12 Relay E-BUS Expansion Module (OE358-23E-12R;

AAON Part No. R69180) using a modular cable.

The MODGAS-XWR Controller can be conﬁ gured at the factory for one

(1) modulating valve, two (2) staged modulating valves, or one (1) modu-

lating with multiple ﬁ xed staged valves (stand-alone operation only).

When using the MODGAS-XWR Controller to replace an existing

MODGAS II Controller, see Appendix B, page 27 for details.

1 2 3 4 5 6 7 8 ... 27 28

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Orion-system MODGAS-XWR Manuel d'utilisateur Page 3

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