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Thru-the-Wall Comfort
Heating & Cooling
Installation Guide
NCC Series
Cased Coil
Read Installation Manual
Prior To Starting The Installation.
Important: This Document is customer property and is
to remain with this unit.
National Comfort Products
A Division of National Refrigeration and Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020-5908
(800) 523-7138
www.nationalcomfortproducts.com
Go Thru-the-Wall
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Summary of Contents for NCP NCC Series
- Page 1 Thru-the-Wall Comfort Heating & Cooling Installation Guide NCC Series Cased Coil Read Installation Manual Prior To Starting The Installation. Important: This Document is customer property and is to remain with this unit. National Comfort Products A Division of National Refrigeration and Air Conditioning Products, Inc.
- Page 2 Installation Guide | NCC Series Cased Coil Table of Contents Safety Warnings......................3 Inspection........................3 Codes & Regulations....................3 Installation Preparation....................3 Condensate Drain Preparation...................4 Coil Installation......................5 Suction Line Connection....................6 Metering Device/TXV....................7 Leak Check.........................8 System Charging......................8 Coil Cleaning Instructions..................9 A2L Coils and Refrigerant Detections Systems.............9-13 Additional A2L Installation Requirements..............13...
- Page 3 Installation Guide | NCC Series Cased Coil Safety Warnings! WARNING POTENTIAL SAFETY HAZARDS ARE ALERTED USING THE FOLLOWING SYMBOLS. THE SYMBOL IS USED IN CONJUNCTION WITH TERMS THAT INDICATE THE INTENSITY OF THE HAZARD. WARNING THIS SYMBOL INDICATES A POTENTIALLY HAZARDOUS...
- Page 4 Installation Guide | NCC Series Cased Coil The appliance shall be installed in accordance with national The drain lines must be installed with ¼” per foot pitch to provide regulations. This product was tested at an external static pres- free drainage. A condensate trap MUST be installed on the sure of 0.66”...
- Page 5 Installation Guide | NCC Series Cased Coil Pipe-work including piping material, pipe routing, and installation CAUTION shall include protection from physical damage in operation and service and be in compliance with national and local codes and COIL SHOULD BE INSTALLED ON THE DISCHARGE SIDE OF standards, such as ASHRAE 15, ASHRAE 15.2, IAPMO Uniform...
- Page 6 Installation Guide | NCC Series Cased Coil Fig. 2A To position the coil on furnace: Metal Plate location for a Downflow/Counterflow 1. Locate the air outlet of the furnace. Application 2. Adjust flanges accordingly and position the coil over or under the furnace outlet.
- Page 7 Installation Guide | NCC Series Cased Coil Fig. 3B-1 Metering Device/TXV National Comfort Products coils are made with an adjustable Recommended location for horizontal TXV bulb TXV. mount Fig. 3A Components of a typical TXV assembly The TXV sensing bulb SHOULD be mounted on the suction line approximately 6”...
- Page 8 Installation Guide | NCC Series Cased Coil Fig. 3B-2 3. If any leaks or are discovered, relieve system pressure and repair leaks. Repeat steps 1-3. Recommended location for vertical TXV bulb mount 4. With no leaks or weak connections present, evacuate the system and charge as per the outdoor unit manufacturer instructions and specifications.
- Page 9 Installation Guide | NCC Series Cased Coil NOTICE WARNING WHEN ADJUSTING THE TXV, THE VALVE STEM OR DISCONNECT POWER BEFORE SERVICING ADJUSTING SCREW SHOULD NOT BE ADJUSTED MORE INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY THAN A 1/4 TURN AT A TIME. TO ADJUST SUPERHEAT, BE PRESENT.
- Page 10 Installation Guide | NCC Series Cased Coil Qualification of Workers Checks to the Refrigerating Equipment Where electrical components are being changed, they shall be Only technicians with training carried out by national training fit for the purpose and to the correct specification. At all times...
- Page 11 Installation Guide | NCC Series Cased Coil Ensure that seals or sealing materials have not degraded to the point For appliances containing flammable refrigerants, refrigerant purg- that they no longer serve the purpose of preventing the ingress of ing shall be achieved by breaking the vacuum in the system with flammable atmospheres.
- Page 12 Installation Guide | NCC Series Cased Coil g. Start the recovery machine and operate in accordance with Refrigerant Detection System Installation instructions. For the field installation of the included RDS, please see addi- h. Do not overfill cylinders (no more than 80 % volume liquid tional installation manual included with the kit.
- Page 13 Installation Guide | NCC Series Cased Coil DEEP VACUUM METHOD Minimum Mitigation Airflow for R454B Systems The Deep Vacuum Method requires a vacuum pump rated for Total Total Total Minimum Minimum Minimum Minimum 500 microns or less. This method effectively and efficiently en-...
- Page 14 Installation Guide | NCC Series Cased Coil ALTITUDE ADJUSTMENT FACTOR TO CALCU- Altitude Adjustment Height/Altitude (m) Height/Altitude (ft) Factor (AF) LATE MINIMUM ROOM AREA 0 (Sea Level)-200 0 (Sea Level)-656 1.00 The indoor equipment mitigation requirements are calculated at 200-400 656-1312 1.00...
- Page 15 Installation Guide | NCC Series Cased Coil AIR CONDITIONER ONLY CASED COIL CASED COIL SINGLE STAGE 2 STAGE MITIGATION+ MITIGATION+ AIR CONDITIONDER AIR CONDITIONDER ACCESSORY ACCESSORY FURNACE / FURNACE / COLOR CODE: COLOR CODE: CONTROL KIT THERMOSTAT OUTDOOR CONTROL KIT...
- Page 16 National Comfort Products A Division of National Refrigeration and Air Conditioning Products, Inc. 539 Dunksferry Road | Bensalem, PA 19020-5908 (800) 523-7138 www.nationalcomfortproducts.com 14291171 NCC IM 12/16/2024...
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