Dometic VN 780, VN 770, VN 830, VN 880 User Manual

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REMOTE AUXILIARY AIR CONDITIONING AND AIR DISTRIBUTION SYSTEMS FOR VOLVO L-5 CHASSIS
INSTALLATION GUIDELINES
ENGLISH
Dometic Environmental Corporation
Rev. 20071204
L-2485
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COPYRIGHT © 2007 Dometic Corporation, All Rights Reserved.
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without prior written consent by Dometic Environmental Corporation. Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Dometic Environmental Corporation assumes no responsibility for errors and omission. Neither is any liability assumed for damages resulting from the use of this product and information contained herein.
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Volvo L-5 A/C - Air Distribution System
DOMETIC TRUCK REMOTE AUXILIARY AC SYSTEMS FOR VOLVO L-5 CHASSIS
CONTENTS
INTRODUCTION 4
INSTALLING THE CONTROL 4
Required Tools 4
Installing the Qt Digital Display
Mounting the Power Logic Box
Routing Cables
INSTALLING THE RETURN AIR VENT 7
INSTALLING THE SUPPLY AIR DISTRIBUTION 7
Volvo Ductwork 7
Custom Air Distribution Plenum 1
Preparing for mounting the footwell and air plenum 1
Re-installing the Footwell 1
Installing the Plenum on the Front of the CHEB 1
INSTALLING THE CHEB 14
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INSTALLING THE CONDENSER 17
ROUTING THE REFRIGERANT LINES AND CONDENSER POWER CABLE 18
TESTING THE INSTALLATION 20
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Volvo L-5 A/C - Air Distribution System
INTRODUCTION
The instructions that follow represent years of development of parts and procedures that make the system perform well and appear “factory-installed.”
Figure 1. Typical Control Installation
INSTALLING THE CONTROL
Mount the control in a place that provides the driver convenient access. An ideal location would be near the current HVAC controls.
Required Tools
• Drill motor
• Hole saws: 1-5/8", 1-7/8", 2-1/2", 3.5" (for 10K unit) and 4"
• Drill bits: 1/8", 5/32", 9/32"
• Nut drivers: 1/4", 3/8", 15/16"
• Phillips head screwdriver
• Open-end wrenches: (2) 7/16", (1 each) 5/16", 13/16" & 3/4"
• Torque wrench may be also be required
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Installing the Qt Digital Display
Refer to the mounting instructions and template provided with your kit.
• Route the CXP cable through the wall and into the luggage compartment. Remove the factory HVAC control panel to do this.
• Route the CXP cable to the rear of the bunk for later connection.
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Figure 2. Mounting location for Power Logic Box
Mounting the Power Logic Box
The Power Logic Box (PLB) will be mounted under the rear, center portion of the bunk (see Figure 2). To accomplish this, rst remove the carpeted panel at the rear of the bunk. It is held in place by “Christmas trees” at each corner.
Remove the backing plate from the PLB, by removing the four machine screws at the bottom (see Figure 3).
Place the backing plate on the front of the bunk center area, off center toward the passenger side. Locate the two weldnuts, and place the backing plate between them. Mark the four mounting holes, and remove the plate.
Drill four diameter 7/32" holes. Use four #10 machine screws to mount the box. The easiest way to do this is to put the machine screws through the holes, and secure with a nut. Replace the mounting plate onto the PLB. Slide the PLB behind the bunk, and push
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Volvo L-5 A/C - Air Distribution System
Figure 3. Fastener location on Power Logic Box
onto the machine screws. Secure the box with four nuts and lockwashers. KEPS nuts are easiest to use.
Routing Cables
The box has several different types of cables:
• Wires enclosed in split loom
• Flexible power cables
• “Phone” type cables
The “wires in split loom” will go toward the CHEB unit.
The exible power cord(s) will go toward the power distribution panel.
The phone cable mounted on the CHEB unit plugs into the hole marked “TSEP.”
The phone cable from the control display plugs into the hole marked “Display.”
For easier installation, it is recommended that the cables be placed in the appropriate direction before mounting the box. All cables should be neatly routed and clipped, to prevent chafng.
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Figure 4. Vent location
INSTALLING THE RETURN AIR VENT
The supplied return air vent should be installed under the bunk in the side panel, either on the passenger or driver side. The passenger side is recommended as there is less chance that it will get blocked by objects in the luggage compartment, and it will also allow easy access to the refrigerant tting.
To install, locate the area shown in Figure 4.
The grill should be installed between the panel supports on the backside of the kickpanel. Locate the supports and cut out for the grill. A holesaw and reciprocating saw is recommended to cut out the hole. If your kit contains the 12.5" x 5.5" grills instead of the 10" x 10" grill, use a 4" holesaw to cut at least two holes behind each grill. Use of the reciprocating saw is optional for those grills.
INSTALLING THE SUPPLY AIR DISTRIBUTION
For this installation, a custom air plenum must be installed, as well as the Volvo ductwork. A 4" duct will feed the Volvo ductwork, and a 6" (for the 14k system) or 4" (for the 10k system) will feed the custom air plenum.
Volvo Ductwork
To feed the Volvo ductwork, remove the passenger side window footwell and a section of the duct, as shown in Figure 5 and 6.
The duct is secured from the top by “star” screws. Below the bunk, there is a sensor which must be removed. Access the sensor from the passenger luggage door. Remove the duct from the truck, and cut a 4" hole into it as shown in Figure 7 & 8.
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Volvo L-5 A/C - Air Distribution System
Figure 5. Location of installed ductwork
Figure 6. Footwell removed
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Figure 7. Removal of sensor.
Figure 8a. Four inch hole cut in Volvo duct. Figure 8b. Installation of grill and ducting.
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Figure 9. Installing the weatherstripping on the custom plenum.
Locate the V4 RND BLACK 4" grill. Using two cable ties, secure the vanes so that they will not turn. See Figure 8a and 8b. Use a length of the supplied weather stripping under the lip of the grill to prevent air from leaking after installation. Install the grill from the inside of the duct, with the vanes pointing upward. Push the duct and grill back into the hole from which it came. With assistance from outside the truck, reach into the luggage compartment and push the length of 4" duct and one hose clamp over the grill. Push the duct over the grill until the grill is tight up against the duct, then tighten the clamp. Replace the duct, and tighten the screws.
Custom Air Distribution Plenum
Find the metal custom plenum and the passenger side window footwell.
Locate the four (4) V4 RND BLACK grills and line up on the window footwell to mark for hole cutting. See Figure 10. Use a 4" holesaw to cut the holes.
Line the anges of the plenum with the weather strip­ping. See Figure 9. Place the plenum on the back of the footwell and secure with the 6-32 screws. Trim the
carpet at the bottom of the plenum duct so that the carpet will fold up.
Preparing for mounting the foot­well and air plenum
Before the footwell is mounted back into the truck, the cut out for the duct must be made to allow the duct to extend below the bunk surface. Use the template, as provided in Figure12a or 12b, to cut the hole. Use a 1/8" bit to drill locator holes from under the bunk. Go to the passenger side luggage door, and look up to the rear corner of the bunk. See Figure 11. Find the metal support that holds the bunk, and drill right at the edge at the side of the truck, and towards the rear of the truck.
Re-installing the Footwell
Gently insert the duct into the hole. Direct it down­ward, while pushing the footwell toward the window. Once it is all the way down, put the top ange of the footwell behind the window fascia. Fasten the foot­well to the wall and oor.
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Figure 10. Preparing to install grills in footwell cover.
Figure 11. Location of cut out for ductwork.
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5
.
3
2.00
Cut with 3.5"
holesaw
Cut with reciprocating
saw
Figure 12a. Template for 4" duct for 10K unit
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3.50
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4
Drill with 4"
hole saw
Cut with reciprocating saw
Figure 12b. Template for 6" duct for 14K unit
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Figure 13. Supply Air Distribution Plenum.
Installing the Plenum on the Front of the CHEB
Using a ¼" nutdriver, remove the plastic 5" or 7" oval hose adaptor. Find the 4"x 6" (or 4"x4") distribution plenum. Install the weather stripping on the contact surfaces and place over the hole on the unit. Reinstall the screws into the new plenum.
INSTALLING THE CHEB
Install the CHEB on the passenger side of the truck.
Locate the CHEB template (supplied with the unit) and position it with the “edge of the unit” 1-1½" from the factory HVAC unit mounting foot. The “edge of the
unit” line with the notations for the quick connections should be nearest the bunk wall. The line of the “edge of the unit” should be approximately 5" from the bunk wall.
Mark for the two quick connect holes 3½" off the “edge of the unit” using the construction lines. Drill through the rubber mat with a 2½" hole saw (DO NOT DRILL THROUGH THE METAL). Then drill through the metal with a 1-7/8" holesaw.
Drill the drain hole with a 1-5/8" hole saw.
Drill for mounting brackets for the CHEB using the following recommnedations:
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Figure 14. CHEB installed in passenger luggage box.
• One inboard on the CHEB at the corner nearest the rear of the truck
• One on the front, outboard
• One on the outboard near the air distribution plenum
• One on the front of the CHEB, inboard (near the factory HVAC unit)
Use the “edge of unit” line to situate one of the moun­ting brackets for hole marking. Be sure your bracket is located in an area noted on the mounting template by “XXXXX”. This notation provides locations available for mounting.
Install the watertight grommets (gray) into the two 1-7/8" holes. Push in until they lock in the hole.
Insert the CHEB unit into the truck. Make sure that the drain tting is lined up with the hole. Install the brackets by using one ¼"-20 x 2½" bolt (provided) and one small washer from the top. Secure under­neath the truck with one large washer, and one nylok nut. Snug all bolts, to the point where the bracket just starts to bend, then stop.
Push the condenser fan cord down through one of the gray grommets. Then insert the refrigerant lines into their respective grommets. Lightly lubricate one side of each coupling with light oil or refrigerant oil.
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Figure 15. View of supply ducting connected.
Be sure to get the face and the threads. Hand tighten the quick connect, making sure they thread correctly. Tighten with the correct wrenches (13/16", ¾", and 15/16"). Tighten to 10-12 ft-lbs.
Note:
Any hissing that is heard during the tightening process, is caused by the ttings that are not quite in line. DO NOT STOP TIGHTENING. Keep tightening, and the hissing will stop.
Connect the TSEP (temperature sensor cord located on CHEB) to the PLB. Connect the electrical connec-
tors between the CHEB and PLB (the ones in the split loom). Route and clip to prevent chang.
Connect the ductwork to the CHEB, use the hose clamps to secure. It may be difcult to get the 6" duct on, but it will connect. Use only as much duct as you have to, as extra duct will impede air ow.
Install the 3/8" drain tting into the bottom of the CHEB from the under side of the truck, nger tighten. Place the hose clamp over the end of the P-trap. Push the end of the P-trap over the drain tting, and tighten clamp.
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Figure 16. Condenser installed on mounting plate.
INSTALLING THE CONDENSER
The Dometic condenser may be installed either under or behind the sleeper. These installations (and the parts in the kit) are for an installation underneath the sleeper. If you plan on mounting the generator and/or generator radiator underneath the sleeper fairings, we recommend mount the HVAC condenser on the rear of the sleeper.
Mount the condenser to the mounting plate provi­ded. The quick connects should be on the end of the mounting plate with the side extension. Use the nylok nuts provided and snug all bolts. This mounting plate is specially designed to t under the Volvo L-5 chassis. It mounts midline of the truck, just behind the transmission and in front of the exhaust pipe. The “ngers” of the plate t up under a cab support. The rear ange slips over another support. Mount with the four stainless steel self-tapping screws provided.
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Figure 17. Routing of refrigerent lines.
ROUTING THE REFRIGERANT LINES AND CONDENSER POWER CABLE
The refrigerant lines will pass over the exhaust pipe, then over top of the condenser mounting plate, and back around to the quick connect. Connect the quick connects in the manner described previously. Secure the refrigerant lines as shown, with one cushion clamp on the mounting plate side extension, and one on the
opposite side to prevent movement and chang. Use cable ties to secure the refrigerant lines to each other and to the condenser power cable. After connecting the condenser power cable, secure power cord in such a manner that the connections are pulled in a linear fashion, not to the side.
Install the heat shield as shown, using two 6" hose clamps.
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Figure 17. Heat shield installed.
Figure 18. Routing of refrigerent lines
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Figure 20. Routing of refrigerant lines.
TESTING THE INSTALLATION
Supply power to the power distribution panel with either shorepower or generator power. Look at the display panel and conrm that the display is lit up. Press the FAN button to activate the fan in manual mode. Check for airow from all vents. Next, press the HEAT button and run the SETpoint up sufciently for the unit to come on in heat mode. The HEATING LED should illuminate. The air should start warming up. To conrm heating quicker, manually lower the fan speed ot the lowest setting.
Next, check the cooling mode. Press the COOL button, then run the SETpoint down sufciently for the unit to come on in the cool mode. The COOLING LED should illuminate. The air should start cooling down.
Check to make sure the condenser fan is running. If it is cool, it may take a few minutes for the condenser fan to come on. This is normal. Shut down the unit by pressing OFF. You are now nished with the installa­tion.
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Dometic Environmental Corporation
P.O. BOX 15299 I RICHMOND, VA 23227 USA I 804-746-1313 I FAX 804-746-7248
www.DometicTruck.com I sales@DometicTruck.com
L-2485 Rev. 20071204
UNITED STATES & CANADA SERVICE ONLY
8:00 AM to 5:00 PM Eastern Time
For all other areas visit our website to nd your nearest distributor.
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