IHP F3772 Instructions Download Page 1

Instructions for Field Service Upgrade 

on AltairDLX / DRT 4200 (units with 

lights only) Direct-Vent Gas Fireplaces 

Applicable Models Listed Below

*

P/N 900915-01 Rev. A  11/2018

For more information, visit IHP.US.com

INSTALLATION INSTRUCTIONS

1.  Turn off the unit, let it cool at room temperature, remove the barrier 

and remove glass door.

2.  From inside unit, remove the four (4) inner screws at location shown 

in Figure 1, if present (screws may not be installed).

3.  Remove three (3) front fastening screws (see Figure 2).

4.  Lift the rear of the baffle to clear the screws from which it hangs, and 

pull forward (see Figure 3).

KIT CONTENTS

1 ea. Base, Flue Restrictor

1 ea. Flap, Restrictor

1 ea. Plate, Restrictor Extension

2 ea. Assembly, Door Latch

2 ea. Screw, HWH 10-16X1/2 Typ AB Blk

4 ea. Screw, 10-16x.38 HWH "B" Blk

1 ea. Pilot Hood

1 ea. Rear Baffle Block-off Plate (40" models only)

1 ea. Baffle 40 DVA, w/Lights

1 ea. Baffle 45 DVA, w/Lights

1 ea. Installation Instructions

TOOLS REQUIRED

5/16" Socket Screw

Pliers

4mm Allen Wrench

Small Flat Screwdriver

FIELD SERVICE UPGRADES SHALL ONLY BE COMPLETED BY A 

QUALIFIED SERVICE TECHNICIAN

          CAUTION

SHARP EDGES - WATCH YOUR 

FINGERS
Wear gloves to guard against any 

sharp metal edges.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Field Service Upgrade Kit

Cat. No. F3772

40" Models

Cat. No. F3773

45" Models

* Affected Fireplace Models

Astria

®

 Models

Superior

®

 Models

AltairDLX40DEN-B

DRT4240DEN-B

AltairDLX40DEP-B

DRT4240DEP-B

AltairDLX45TEN-B

DRT4245TEN-B

AltairDLX45TEP-B

DRT4245TEP-B

Remove Four (4) Screws

Remove Three (3) Screws

Figure 1

Figure 2

Figure 3

Lift Rear of Baffle Off Screw and 

Pull Forward to Remove. 

Screw

From Left and 

Right Bulb Cover

f i r e - p a r t s . c o m

Summary of Contents for F3772

Page 1: ...HWH 10 16X1 2 Typ AB Blk 4 ea Screw 10 16x 38 HWH B Blk 1 ea Pilot Hood 1 ea Rear Baffle Block off Plate 40 models only 1 ea Baffle 40 DVA w Lights 1 ea Baffle 45 DVA w Lights 1 ea Installation Instructions TOOLS REQUIRED 5 16 Socket Screw Pliers 4mm Allen Wrench Small Flat Screwdriver FIELD SERVICE UPGRADES SHALL ONLY BE COMPLETED BY A QUALIFIED SERVICE TECHNICIAN CAUTION SHARP EDGES WATCH YOUR F...

Page 2: ...placement per the manual when installing these units Verify pilot flame is not obstructed Reference manual to test fire unit and verify proper operation IF THE UNIT IS REAR VENTING CONTINUE ON TO INSTRUCTIONS ON NEXT PAGE 5 Remove the lintel from the old baffle by bending tabs up see Figure 4 and sliding the Lintel off of the front edge of the baffle 6 Remove light glass holders from old baffle by...

Page 3: ...ion in new baffle as shown in Figure 9 3 Install the bent Baffle Block Off Plate as shown in Figure 8 using the 2 screws provided in kit Figure 11 Vent restrictor installation Top vent Figure 12 Vent restrictor installation Rear vent Installation in top vent Put flap and wing if installed directed toward the rear of unit Installation in rear vent Install so flap and wing if installed will stay clo...

Page 4: ...is complete with the installation of the Block Off Plate 4a Remove pilot head by pulling up firmly discard it and verify proper pilot gas setting For Natural gas units the orifice should be turned counter clockwise For Propane LP gas units the orifice should turned clockwise Some pilot orifices require a small flat standard screwdriver and somerequirea4mmallentypewrenchtorotatetheorifice in the pi...

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