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Blizzard Turbo Split System
Installation and Operation Manual
Dometic Truck
Rev. 20170601
L-3448 English
P/N 339061
COPYRIGHT © 2011-2016 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 Corporation. Every precaution
has been taken in the preparation of this manual to insure its accuracy. However, Dometic 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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Table of Contents
Troubleshooting
Related Manuals for Dometic Blizzard Turbo
Summary of Contents for Dometic Blizzard Turbo
- Page 1 Dometic Corporation. Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Dometic 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...
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Page 2: Table Of Contents
Table of Contents INTRODUCTION ....... 1 AC L ... . 20 OLTAGE ALIBRATION AC L... -
Page 3: Introduction
The Dometic Blizzard Turbo is an auxiliary air conditioning system that cools the sleeper cab and keeps the driver comfortable without running the engine. Instead of wasting fuel by using an idling engine to power the truck's own air conditioning system, the Blizzard Turbo uses an alternative source of power, such as: •... -
Page 4: Safety
SAFETY and comfort. ELECTRICITY - Many Dometic products operate on 115, 230 or 440VAC power. Such voltages can be LETHAL; therefore, the chassis, cabinets, bases, etc., on all components must be grounded together and connected to the vessel’s grounding system. -
Page 5: Afe Andling Of
VENTILATION - To cool or heat air, Dometic Air Conditioning and Refrigeration components are designed to move air through a heat exchanger by a blower or propeller fan. This design necessarily produces a suction on one side of the air handling component and a pressure on the other side. -
Page 6: Before You Start
For APU-powered systems: Generator installation and operating instructions will be provided by your APU system supplier. For Dometic battery-powered systems: A separate manual covers installation of the batteries, inverter, alternator / regulator and other components. If you do not have this manual, you can download it from www.dometictruck.com. -
Page 7: Parts List
Heating and A/C duct work may be routed in existing closets or storage compartments. • Truck's engine must be fitted with an upgraded alternator and wiring of 300 amps or more. • For optimum performance, main batteries should be upgraded to recommended batteries specified by Dometic. TTEMPT THIS NSTALLATION NLESS •... -
Page 8: Installation Instructions
INSTALLATION INSTRUCTIONS Blizzard bo Split System Manual INSTALLATION INSTRUCTIONS 1: I CHEB NSTALLATION OF THE Ensure that the CHEB (Compressor, Heater, Evaporator, Blower) is placed so that all electrical wiring connections and refrigerant ports are easily accessible for future maintenance and service. NOTE: If the CHEB will be installed in a tight-fitting area, it is best to cut all holes and install supply and return air grilles before installing the CHEB unit, so that nothing will interfere with hole saws or drilling locations. - Page 9 Blizzard Turbo Split System Manual INSTALLATION INSTRUCTIONS Figure 2: CHEB Template (not to scale) Use utility knife to cut holes in each snap grommet. Install grommets into the two larger holes cut for line sets. Prep CHEB for installation. Sometimes there is a lack of access to the line sets once CHEB is bolted to vehicle, therefore, it is best to connect line set (90 degree portion) to the CHEB before lowering it into bunk.
- Page 10 15. Once CHEB is properly mounted, run flexible duct between adapters on CHEB and supply air grilles or Dometic duct towers. Run duct as straight as possible, do not have any kinks or sharp bends that will restrict air flow, and us only as much duct as needed.
- Page 11 Blizzard Turbo Split System Manual INSTALLATION INSTRUCTIONS Figure 5: Example of ducting from plenum (Option 1: Two 4” flex ducts) Figure 6: Example of ducting from plenum (Option 2: One 5” flex duct) 16. Install P-Trap on drain fitting under truck for condensate pan. Make sure the open end of the P-Trap is facing the rear of the truck and tighten it.
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Page 12: Installing Ignition
INSTALLATION INSTRUCTIONS Blizzard bo Split System Manual Figure 7: Under the cab, the opening of the P-trap must face the rear WARNING It is very important that you use the P-Trap to create a water seal to prevent hazardous or deadly fumes from entering the sleeper from under the truck. -
Page 13: Part 3: Securing Line
Blizzard Turbo Split System Manual INSTALLATION INSTRUCTIONS Attach rivet nuts to the truck body. Use rivet nuts provided (or McMaster-Carr ® #95105A143). Use an appropriate tool such as McMaster-Carr ® #95585A600 plus mandrel set 95585A650. In order: The first thing to go on the bolt is the lock washer, followed by the flat washer, then through the condenser, then into the rivet nut. -
Page 14: Part 4: Installing Qt
INSTALLATION INSTRUCTIONS Blizzard bo Split System Manual Figure 9: Neat Line Set Installation 4: I NSTALLING ONTROL When deciding on the best location to mount the Qt Control, consider where it will be most convenient for the driver to use while in the bunk. -
Page 15: Part 5: Duct And Grille
Blizzard Turbo Split System Manual INSTALLATION INSTRUCTIONS Once you have decided on a location, drill hole for CXP cable. Mount the backing plate provided with the control. Run the CXP cord from the switch to CHEB unit and plug into the socket marked Display. You can run cord along duct work if it makes it easier. -
Page 16: Supply Air Grilles
If truck has factory-installed engine-driven air conditioning/heat, you may be able to use an adapter or other means to connect the Dometic air conditioning duct to the existing ductwork. Otherwise, run two or more ducts (depending on system size—use all that are included in your kit) from the unit to the supply grilles. - Page 17 Blizzard Turbo Split System Manual INSTALLATION INSTRUCTIONS Figure 13: Example - Option 2: Connecting one 5” flex duct and one tower stacked) L-3448 ENGLISH...
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Page 18: Operating The System With Qt Controls
OPERATING THE SYSTEM WITH QT CONTROLS Blizzard bo Split System Manual OPERATING THE SYSTEM WITH QT CONTROLS UICK TART Use the COOL, HEAT or AUTO button to start desired function. To adjust setpoint, push plus (+) or minus (-) button to increase or decrease temperature in single increments or press and hold either button to scroll temperature until desired setpoint is reached. -
Page 19: Q T Basic Operation
Blizzard Turbo Split System Manual OPERATING THE SYSTEM WITH QT CONTROLS ASIC PERATION OWER When AC power is applied to the system at the circuit breaker, the Qt Control/Display microprocessor performs a self-check and retrieves, from permanent memory, the last operating configuration. This process takes about four seconds, after which the system will begin operating just as it had been when power was last turned off. -
Page 20: Manual Speedc
OPERATING THE SYSTEM WITH QT CONTROLS Blizzard bo Split System Manual setpoint, the fan speed will decrease to medium speed at 2°F above setpoint and low speed at 1°F above setpoint. Upon a further drop in internal temperature, the compressor cycles off and the fan will continue to operate at low speed. In HEAT mode or AUTO HEAT, the fan increases one speed until 3°F below the setpoint is obtained. - Page 21 Blizzard Turbo Split System Manual OPERATING THE SYSTEM WITH QT CONTROLS To adjust low fan speed: While in OFF mode, enter programming mode by pressing the MODE and minus (-) keys for three seconds. The display will flash "PO" during the three seconds. After the three-second flash, a flashing 1 will appear on the display, which is function #1.
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Page 22: High Fan Speeda
OLTAGE Turn off all on-board AC loads including the air conditioning unit and measure the line voltage at the Dometic power electrical box input terminals with an accurate voltmeter. While in OFF mode, enter program mode by pressing MODE and minus (-) keys for three seconds. -
Page 23: Led Sleep Mode
Blizzard Turbo Split System Manual OPERATING THE SYSTEM WITH QT CONTROLS EMPERATURE ALIBRATION Typically, the temperature sensor is within +/- 2 degrees of actual room temperature. To check or calibrate the sensor: turn AC unit off. While in OFF mode, enter program mode by pressing MODE and minus (-) keys for three seconds. The display will flash "PO"... -
Page 24: Rror Messages
OPERATING THE SYSTEM WITH QT CONTROLS Blizzard bo Split System Manual AULT HUTDOWNS AND RROR ESSAGES When power is lost, the system will begin operating in the previous mode prior to power loss. All program values are retained in a non-volatile memory. The Qt Control/Display contains built-in safeguards designed to protect the air conditioning system from damaging conditions. -
Page 25: Troubleshooting
Blizzard Turbo Split System Manual TROUBLESHOOTING TROUBLESHOOTING ONTROL ISPLAY ROUBLESHOOTING UIDE Table 5: QT CONTROL/DISPLAY PROBLEMS & SOLUTIONS PROBLEM POSSIBLE SOLUTION Display not on 1. Turn circuit breaker on 2. Check CXP cable and connections 3. Replace Control/Display 4. Replace Power Logic Board Erratic temperature display 1. - Page 26 TROUBLESHOOTING Blizzard bo Split System Manual YSTEM ROUBLESHOOTING UIDE NOTE: Internal fan (blower) is constantly on (unless in Power Saver mode); if not check all power connections. Table 6: SYSTEM PROBLEMS AND SOLUTIONS PROBLEM SOLUTIONS Unit does not operate at all. Internal fan 1.
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Page 27: Q T Control /Display T System Troubleshooting Guide Optimizing Performance
Occasionally check for chafe on outside wires and refrigerant lines (split systems). Dometic’s Blizzard Turbo is designed so that you should never need to recharge the refrigerant loop under normal circumstances. If the refrigerant level ever needs to be adjusted, federal law requires that it must be done by an EPA-licensed HVAC technician with the proper tools to avoid accidental discharge of any refrigerant gas into the air. -
Page 28: Operation And Maintenance Total System Charge
TROUBLESHOOTING Blizzard bo Split System Manual OTAL YSTEM HARGE TANDARD ENGTH A typical system consists of a CHEB, a line set, and a condenser. Each of these components come from the factory with a specific amount of refrigerant so that they add up to the correct system charge. Therefore, the installer should not usually add or subtract refrigerant. - Page 29 NOTES...
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- Page 32 DOMETIC TRUCK DIVISION 2000 N. Andrews Ave. Pompano Beach, FL 33069 USA +1 888-767-3362 Email sales@dometictruck.com dometic.com L-3448 | 06/01/2017...