ENGLISH REMOTE AUXILIARY AIR CONDITIONING AND AIR DISTRIBUTION SYSTEMS FOR VOLVO L-4 CHASSIS INSTALLATION GUIDELINES For Volvo Truck Models VN630 and 670 Dometic Environmental Corporation Rev.
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Volvo L-4 Installation Guidelines Contents INTRODUCTION 5 LOCATING THE COMPONENTS 6 INSTALLING THE CONTROL 8 INSTALLING THE RETURN AIR VENT 9 INSTALLING THE SUPPLY AIR DISTRIBUTION ENGLISH 10
Volvo L-4 Installation Guidelines INTRODUCTION This document contains supplemental guidelines for installing the Qt-series control and air distribution for the Dometic auxiliary air conditioning system on the Volvo L-4 chassis. It is intended to be used in conjunction with the standard installation manual, which covers all other aspects of installing, testing and operating this system. Do not attempt to install any components until you read and understand the instruction in both manuals.
Volvo L-4 Installation Guidelines LOCATING THE COMPONENTS The Dometic remote auxiliary air conditioning system consists of two basic components: an outside condensing unit, which contains the condenser and an exhaust fan, and an inside unit, which contains the compressor, heater, evaporator and blower (CHEB). The two units are connected by precharged refrigerant lines with quick-connect fittings.
Volvo L-4 Installation Guidelines We recommend you install the return air grill under the bunk in the side panel on the passenger side. This will make it less likely for the air flow to be blocked by something in the luggage compartment, and will also give you easy access to the quick-connect refrigerant fittings with a wrench. 5" (max.
Volvo L-4 Installation Guidelines INSTALLING THE CONTROL Installing the Control/Display Panel For the L-4 chassis, we recommend mounting the control/display panel on the wall above the drivers’ side cabinet (Fig. 5); remove the truck’s HVAC panel to access the area to make it easier to route the cabling to the Power Logic Box (PLB). The CXP cable will run down inside the wall and across the luggage compartment to the PLB.
Volvo L-4 Installation Guidelines INSTALLING THE RETURN AIR VENT The return air vent will be mounted under the bunk in the side panel on the passenger side. It will just fit between the panel supports on the backside of the kick panel. (Note: if your return air kit has the two 12½" x 5½"grills instead of the single square grill, either use a 4" hole saw to cut at least two holes behind each grill or use a reciprocating saw to cut out the rectangular holes for these grills.
Volvo L-4 Installation Guidelines INSTALLING THE SUPPLY AIR DISTRIBUTION For the L-4 chassis installation, you will use the factory-installed Volvo ductwork for supply air distribution. In addition, you will add one or two 4" ducts to extra discharge grills. The 10,000 BTU air conditioner uses one 4" duct, and the 14,000 BTU system uses two. Connecting to the Volvo Ductwork First, remove the rubber duct transition that is located in the passenger-side luggage compartment (Fig. 11).
Volvo L-4 Installation Guidelines Install the grill from the inside of the duct with the vanes pointing upward. Use two cable ties to secure the vanes so they will not turn. Drill holes in the duct transition, and pop rivet into place using the supplied rivets and brass washers (Figs. 15a-15b). Push the duct and grill back into the hole in the Volvo duct. Attach the 4" duct with a hose clamp. Push the duct over the grill until it is tight against the transition, and then tighten the clamp (Fig. 16).
Volvo L-4 Installation Guidelines Installing the Remaining 4” Ductwork and Grills The location for the additional discharge grill or grills (one for the 10,000 BTU AC and two for the 14,000 BTU AC) is up to the installer or owner. Based on our experience with this truck chassis, we recommend the following (Fig. 17): Up through the passenger-side cabinet Low on the floor, driver’s side, in front of the cabinets You will need to install a new plenum on top of the CHEB unit.
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 UNITED STATES & CANADA SERVICE ONLY 8:00 AM to 5:00 PM Eastern Time 24/7 A/C SERVICE HOTLINE: 5:00 PM to 8:00 AM 888-440-4494 L-2518 Rev. 20071205 For all other areas visit our website to find your nearest distributor.
