Table of Contents
Advertisement
M
Pac II™
od
Vertical Modular Wall-Mount
Air Conditioners
Installation and Operation Manual
MODELS AVP 24-30-36-42-48-60
Supporting Member of
1. Description ........................................ 5
2. Installation ........................................ 8
3. Start-Up ...........................................19
4. Troubleshooting ................................20
6. Maintenance .....................................27
7. Warranty ..........................................28
Exploded Views & Parts Lists ...................29
Manufactured By:
Marvair
Division of AIRXCEL
, Inc.
®
®
P.O. Box 400 • Cordele, Georgia 31010
156 Seedling Drive • Cordele, Georgia 31015
(229) 273-3636 • Fax (229) 273-5154
E-mail: marvairtech@airxcel.com • Internet: www.marvair.com
P/N 81021
9/09-15
The most current version of this manual can be found at www.marvair.com.
supersedes manual dated 2/08-14
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Marvair ModPac II
Summary of Contents for Marvair ModPac II
-
Page 1: Table Of Contents
P.O. Box 400 • Cordele, Georgia 31010 156 Seedling Drive • Cordele, Georgia 31015 (229) 273-3636 • Fax (229) 273-5154 E-mail: marvairtech@airxcel.com • Internet: www.marvair.com P/N 81021 9/09-15 The most current version of this manual can be found at www.marvair.com. supersedes manual dated 2/08-14... -
Page 2: How To Use This Manual
How To Use This Manual This manual is intended to be a guide to Marvair's M line of vertical air conditioners. It contains ™ installation, troubleshooting, maintenance, warranty, and application information. The information contained in this manual is to be used by the installer as a guide only. This manual does not supersede or circumvent any applicable national or local codes. - Page 3 WARNING • If the information in these instructions are not followed exactly, a fire may result causing property damage, personal injury or loss of life. • Read all instructions carefully prior to beginning the installation. Do not begin installation if you do not understand any of the instructions. •...
- Page 4 Periodic Maintenance Requirements 6.1 Scheduled Maintenance ....................... 27 Warranty Information 7.1 Warranty Statement ........................28 Exploded Views & Parts Lists ......................29 Illustrations Figure 1. Typical Electric Schematic ................... 7 Figure 2. Damper Air Path ......................10 Figure 3. Fresh Air Hood Adjustment ..................13 Figure 4.
-
Page 5: Description
Pac II™ A/C Description & Specs 1.1 General Description The Marvair M Pac II™ air conditioner line is a series of vertical wall-mounted air conditioning systems that provide heating and cooling for modular construction offices and classrooms. The series includes three cabinet sizes and nominal cooling capacities from 24,000 to 56,000 BTUH. -
Page 6: General Operation
1.2 General Operation Refrigerant Cycle (Cooling Mode) The ModPac II™ A/C uses R-22 refrigerant in a conventional vapor-compression refrigeration cycle to transfer heat from air in an enclosed space to the outside. A double blower assembly blows indoor air across the evaporator. Liquid refrigerant passing through the evaporator is boiled into gas by heat removed from the air. -
Page 7: Figure 1. Typical Electric Schematic
Figure 1. Typical Electric Schematic for Models AVP24-60 Pac II, 9/09-15... -
Page 8: Installation
Failure to observe and follow Warnings and Cautions and these Instructions could result in death, bodily injury or property damage. Read this manual and follow its instructions and adhere to all Cautions and Warnings in the manual and on the Marvair unit. 2.1 Equipment Inspection Concealed Damage Inspect all cartons and packages upon receipt for damage in transit. -
Page 9: Table 1. Voltage Limitations
Do not obstruct airflow through the unit. Applications using duct work should be designed and installed in accordance with all applicable safety codes and standards. Marvair strongly recommends referring to the current edition of ®... -
Page 10: Figure 2. Damper Air Path
Motorized Damper - 0 to 450 cfm of Outside Air and Pressure Relief (Configuration B) The settings of the damper require a balometer and a thermometer for measuring internal and external temperatures. a. Measure the total supply air with a balometer. If the supply air is controlled by a manual fan speed controller, make certain that the air flow is in accordance with Table 3, Air Flow (CFM) at Various Static Pressures. -
Page 11: Installation Materials
VPG -40RF, 30 x 16" Aluminum Return Filter Grille for AVP 42-48-60 *Use when outside air is not required. Remove and discard filter in unit. Additional Items Needed: Additional hardware and miscellaneous supplies (not furnished by Marvair ) are needed for instal- ®... -
Page 12: Porting And Duct Work
The duct system must be engineered to assure sufficient air flow through the ModPac II™ A/C, even under adverse conditions such as dirty filters, etc. Use Table 2 below and Table 3 - CFM at External Static Pressure (Wet Coil) in section 5.1. -
Page 13: Fresh Air Hood Installation
system must be engineered to insure sufficient air flow through the unit to prevent over-heating of the heater element. This includes proper supply duct sizing, sufficient quantity of supply regis- ters, adequate return and filter area. Duct work must be of correct material and must be properly insulated. -
Page 14: V" Damper Installation
2.6 "V" Damper Installation ® Figure 4. "V" Damper Installation 2.7 Bracket Installation 1. The M Pac II™ air conditioners have built-in mounting flanges. See Figure 5. 2. Refer to Figure 5. Attach the bottom support bracket to the wall using appropriate 3/8" diameter hardware. -
Page 15: Mounting The Unit
For units with electric heat, a one inch clearance is required around the duct extensions. The duct extensions must be constructed of galvanized steel with a minimum thickness of .019” as per the NFPA standards 90A & 90B. Figure 5. Wall Mounting Detail - Models AVP24-60 2.8 Mounting the Unit 1. -
Page 16: Electrical Connections
All electrical work must meet the requirements of local codes and ordinances. Work should be done only by qualified persons. CAUTION ModPac II™ A/C units incorporate an internal crankcase heater for compressor protection. The crankcase heater must be energized for at least 24 hours prior to starting the compressor. -
Page 17: High Voltage Wiring
after several minutes of operation the compressor's internal protector will trip. The compressor will then cycle on the protector until the phasing is corrected. Reverse operation for longer than one hour may have a negative impact on the bearings. Failure to ensure proper rotation will void the warranty of the compressor. -
Page 18: Figure 6A. Thermostat Wiring Detail
FIVE (5) Figure 6a. Thermostat Wiring Detail MARVAIR ® /SIMPLE COMFORT THERMOSTAT CONNECTION DIAGRAM FOR MARVAIR MODPAC II™ AIR CONDITIONERS THERMOSTAT PART NUMBER 50121/ SC2010-SL 50124/ SC3001-SL 50123/ SC5011-SL 50107/ SC5811-SL LOW VOLTAGE MODPAC II TERMINAL BOARD Figure 6b. Thermostat Connection Diagram... -
Page 19: Start-Up
Various thermostats can be used to control the air conditioner. The thermostat may have a fan switch with an Automatic and on positions, a system switch with Heat, Cool, and off positions. The spec sheets have detailed description of the various Marvair thermostats. -
Page 20: Troubleshooting
A comprehensive understanding of the operation of the M Pac II™ air conditioner is a prereq- uisite to troubleshooting. Please read the Chapter 1 for basic information about the unit. Marvair Pac II™ air conditioners are thoroughly tested before they are shipped from ®... -
Page 21: Failure Symptoms Guide
4.2 Failure Symptoms Guide PROBLEM/SYMPTOM LIKELY CAUSE(S) CORRECTION A. Unit does not run. 1. Power supply problem. 1. Check power supply for adequate phase and voltage. Check wiring to unit and external breakers or fuses. 2. Blown fuse or breaker. 2. -
Page 22: Compressor Troubleshooting
4.3 Compressor Troubleshooting NOTE: It is important to rule out other component failures before condemning the compressor. The following electrical tests will aid diagnosis: 1. Start-Up Voltage: Measure the voltage at the compressor terminals during start-up. The voltage must exceed the minimum shown in Table 4, section 2.2, or compressor failure is likely. -
Page 23: Electric Heat Controls
4.4 Electric Heat Controls Figure 7. Typical Configuration for Single Element Heater The electric heater assembly can have up to three individual heating elements. Each individual heating element is protected against overheating by its own dual function thermal cut-out switch. Additionally, a separate single function thermal cut-out switch protects the entire heater assem- bly. -
Page 24: Ratings & Specifications
Ratings and Specifications 5.1 Ratings & Specifications Table 1. CFM @ ESP (Wet Coil) MODEL 0.10 0.20 0.30 0.40 0.50 1100 1000 1310 1220 1150 1060 1650 1520 1450 1360 1900 1760 1700 1620 1900 1760 1700 1620 CFM = Cubic Feet per Minute - Indoor Air Flow ESP = External Static Pressure in Inches WG Table 2. -
Page 25: Dimensional Data
5.2 Dimensional Data DIMENSIONS AVPA 24-36 N DAMPER AVPA 24 AVPA 30-36 Figure 8a. AVP24-36 M Pac II™ A/C - "N" Configuration (In Inches) Figure 8b. AVP42-60 M Pac II™ A/C - "N" Configuration (In Inches) Pac II, 9/09-15... -
Page 26: Figure 8C
AVPA 24 AVPA 30-36 Figure 8c. AVP24-36 M Pac II™ A/C - "B" Configuration (In Inches) Figure 8d. AVP42-60 M Pac II™ A/C - "B" Configuration (In Inches) Pac II, 9/09-15... -
Page 27: Maintenance
Maintenance 6.1 Scheduled Maintenance Marvair strongly recommends that the air conditioner be serviced a minimum of twice a year ® – once prior to the heating season and once prior to the cooling season. At this time the filters, evaporator coil, condenser coil, the cabinet, and condensate drains should be serviced as described below. -
Page 28: Warranty
Marvair will honor its warranty and furnish the required replacement part. All costs for shipment and risk of loss during shipment of the product to Marvair and back to the owner shall be the responsibility and liability of the owner. Upon written request by an owner, Marvair may... -
Page 29: Exploded Views & Parts Lists
EXPLODED VIEWS AND PARTS LISTS Current parts lists and exploded views of the unit can be found on our web site at www.marvair.com. Click on the Service and Parts in the menu on the left hand side of the Home page. From the drop down menu, select Exploded Views. Once here, you can select your air conditioner or heat pump. The units are grouped by model and by the refrigerant – R-22 or R-410A. Pac II, 9/09-15...
Need help?
Do you have a question about the ModPac II and is the answer not in the manual?
Questions and answers