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Installation/Operation/Maintenance
Applies to: Model UESA-3
High-Effi ciency, Separated-Combustion,
Low-Static Unit Heater
UESA-3
These appliances meet the following EC Directives:
DIR 2009/142/EC:GAD
DIR 2004/108/EC :EMC
DIR 2006/95/EC :LVD
DIR 2006/42/EC :MD
Applies to
Belarus, Bulgaria, China, Czech Republic, Croatia, Cyprus, Denmark, Estonia, Finland, Greece, Hungary, Iceland,
Latvia, Lithuania, Montenegro, New Zealand, Norway, Poland, Portugal, Romania, Russian Federation, Serbia,
Slovakia, Slovenia, South Africa, Spain, Sweden, Turkey, Ukraine
WARNING
Please read this document carefully before commencing installation, commissioning and/or servicing.
Leave it with the user or attached to the appliance or gas service meter after installation.
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
All work must be carried out by appropriately qualifi ed persons.
The manufacturer does not take any responsibility in the event of non-observance of the regulations concerning
the connection of the apparatus causing a harmful operation possibly resulting in damage to the apparatus and/or
environment in which the unit is installed.
Subject to modifi cations
1612UESA-3/--EN, page 1/31
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Related Manuals for Nortek Global Reznor UESA-3
Summary of Contents for Nortek Global Reznor UESA-3
- Page 1 Installation/Operation/Maintenance Applies to: Model UESA-3 High-Effi ciency, Separated-Combustion, Low-Static Unit Heater UESA-3 These appliances meet the following EC Directives: DIR 2009/142/EC:GAD DIR 2004/108/EC :EMC DIR 2006/95/EC :LVD DIR 2006/42/EC :MD Applies to Belarus, Bulgaria, China, Czech Republic, Croatia, Cyprus, Denmark, Estonia, Finland, Greece, Hungary, Iceland, Latvia, Lithuania, Montenegro, New Zealand, Norway, Poland, Portugal, Romania, Russian Federation, Serbia, Slovakia, Slovenia, South Africa, Spain, Sweden, Turkey, Ukraine WARNING...
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Page 2: Table Of Contents
TABLE OF CONTENTS General..............................3 1.1 Warning 1.2 General information 1.3 Warranty 1.4 Installation codes Unit heater location..........................4 Uncrating & preparation........................4 Clearances & dimensions........................5 Hanging the heater..........................6 Mechanical.............................7 6.1 Gas piping & pressures 6.1.1 Gas supply 6.1.2 Gas connections 6.1.3 Burner gas pressure and adjustment 6.1.4 Gas conversion 6.2 Venting and combustion air... -
Page 3: General
1. GENERAL Warnings FOR YOUR SAFETY What to do if you smell gas: • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier. •... -
Page 4: Unit Heater Location
2. UNIT HEATER Use the minimum clearances in section 4 and the throw data in the technical data table addended when determining where to suspend the heater. LOCATION Recommended minimum height is 2.5mm. For best results, the heater should be placed with certain rules in mind. Always REMARK ensure that minimum clearances are maintained. -
Page 5: Clearances & Dimensions
4. CLEARANCES & Units must be installed so that the clearances in table below are provided for com- bustion air space, inspection and service and for proper spacing from combustible DIMENSIONS materials. Suspend the heater so that the bottom is a minimum of 2.5m above the fl oor. Table 1a: UESA-3 Rear... -
Page 6: Hanging The Heater
5. HANGING THE Before suspending the heater check the supporting structure to be used to verify that it has suffi cient load-carrying capacity to support the weight of the HEATER unit. Suspend the heater only from the threaded nut inserts. Do not suspend from the heater cabinet. -
Page 7: Mechanical
6. MECHANICAL 6.1.1 Gas supply 6.1 Gas piping & WARNING : Pressure testing supply piping pressures Test pressures above 50mbar : Disconnect the heater and manual valve from the gas supply line which is to be tested. Cap or plug the supply line. Test pressures below 50mbar : Before testing, close the manual valve on the WARNING heater. - Page 8 Belarus, China, Croatia, Czech Republic, Cyprus, Estonia, Greece, Iceland, Latvia, Table 4 Lithuania, Montenegro, New Zealand, Portugal,Serbia, Slovenia, Slovakia, South Burner jets and Africa, Spain, Turkey pressures Burner jet 5,30 6,80 7,60 8,90 Nat. Gas (G20) Burner inlet pressure mbar 8,80 8,10 11,20...
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Page 9: Flue Requirements
8) Pressure regulator adjustment screw 6.1.4 Gas conversion Reznor UESA-3 air heaters are designed to operate on natural, propane or butane gas and will be supplied fi tted for the gas type ordered. In the event a site conversion is required it is necessary to change the burner jet and gas valve. - Page 10 The units may be installed as a balanced fl ue type C heater requiring both a com- bustion air inlet pipe and a fl ue pipe or as a power vented heater type B where the combustion air is taken from the space where heater is installed and which requires only a fl...
- Page 11 During operation, condensate is both produced in the heater and collected from the vent- ing system. Therefore, the installaton requires a condensate drain from the secondary heat exchanger and a condensate drain from the fl ue exhaust pipe. A short fl ue pipe with 3/4” condensate drain point is supplied with the heater and a PVC collar for PVC tube of dia 32 is provided to drain the condensate from the secondary heat exchanger (see fi...
- Page 12 Condensate drain traps : Two condensate drain traps are required. Figure 6 illustrates the trap in the drain attached to the heater and lists the minimum required leg dimensions for that trap. Figure 7 illustrates the fl ue exhaust pipe drain trap and shows the minimum dimen- sions for the trap.
- Page 13 Figure 7 Flue condensate drain tap Minimum dimensions D = minimum 130mm C = D + at least 50mm (min 185mm) 6.2.2 Flues for power vented installations (type B appliances) If the air heater is to be installed as a type B appliance, air for combustion will be taken from within the space where the heater is installed.
- Page 14 Figure 9 Approved appliances type B22 - roof B22 - wall For illustrative purposes only. For actual pipe con- nections see fi gure 8. Air supply It is important to ensure that there is an adequate air supply at all times for both combustion and heating requirements.
- Page 15 Figure 10 Approved appliances type For illustrative purposes only. For actual pipe con- nections see fi gure 11. C12b/C62 C32/C62 Figure 11 Type C appliances : combustion air and fl ue pipe sockets 1612UESA-3/--EN, page 15/31...
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Page 16: Electrical Connections
Electrical supply 7. ELECTRICAL SUPPLY AND The electrical installation must only be carried out in accordance with the IEE regu- CONNECTIONS lations and by an appropriately qualifi ed person. The electrical supply line to the heater should include a main isolating switch. The minimum clearance distance between the contacts must be more than 3 mm. -
Page 17: Wiring Connection
7.2 Wiring connection (only for illustrative purposes 1612UESA-3/--EN, page 17/31... -
Page 18: Controls
8. CONTROLS Use either an optional thermostat (1 stage room thermostat, 2 stage clock thermo- 8.1 Thermostats stat, Smartcom control panel or wireless digital thermostat) available with the heater or a fi eld supplied 230V thermostat. Install them according to the manufacturer’s instructions, paying full attention to the requirements regarding the thermostat loca- tion (see section 7.2). - Page 19 8.3.2 Limit controls WARNING Never bypass the limit All units are equipped with temperature activated limit controls. The controls are fac- controls, hazardous tory set and non-adjustable. If either setpoint is reached, the corresponding limit con- conditions could result. trol will interrupt the electric power to the gas valve. These safety devices provide protection in the case of motor failure or lack of airfl...
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Page 20: Ignition System
9. IGNITION SYSTEM This heater is equipped with a direct spark multi tray burner control relay. The con- trol relay monitors the safety devices and controls the operation of the venter motor and the gas valve between heat cycles. The time line below illustrates a normal heat cycle. Power to gas valve and ignitor Start pre-purge Sensor checks for the presence of a flame... -
Page 21: Operation
Check suspension. Unit must be secure. 10. OPERATION Check clearances from combustibles. Requirements are in section 5. Check fl ue system to ensure it is installed according to the instructions 10.1 Check installa- in section 7, fl ueing requirements. ... -
Page 22: Maintenance And Service
10.4 Check insta- To turn off gas supply at the appliance : lation after start- 1) Set thermostat to the lowest possible setting or ‘OFF’ position. 2) Shut off the manual service valve when the fan has stopped. 3) Switch off electric power to the appliance. •... -
Page 23: Maintenance Procedure
Figure 16b : Internal control panel assem- bly located on a removable bracket 13) Control relay (ER) 14) Terminal blocks 15) Connector 16) Pressure switch (S3 11.2 Maintenance 11.2.1 Heat exchanger maintenance procedure This heater has a T-CORE 3 TM heat exchanger (patent pending). Remove any exter- nal dirt or dust accumulation. - Page 24 Figure 18a Figure 17a Figure 18b Figure 17b burner Locking nut Orifi ce orifi ce Figure 19 Burner removal steps Remove screws attaching burner Venturi tube : slide right, rotate out- ward, pull out Disconnect manifold at orifi ce and out- side the heater, slide to the right Inspect and clean With the burner assembly removed, shine a fl...
- Page 25 Figure 20 Inspect the internal portion of the heat exchanger (with burner assembly re- moved). At the burner fl ame entrance of each tube, shine a bright light into each heat exchanger section. With the light shin- ing into the heat exchanger, observe the outside surface of the tube where dis- coloration is evident.
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Page 26: Troubleshooting
Control relay : See fi gure 23. The electronic burner relay monitors the operation of the heater including ignition. Do not open the control relay. Each heating season check the lead wires for insulation deterioration and good con- nections. Proper operation of the direct spark ignition system re- quires a minimum fl... - Page 27 Trial for ignition Call for heat Is there line s there a spark voltage at spark across gap at igniter? igniter? Check connection at spark igniter Is there line Replace igniter voltage to the Replace control relay control relay? Check wiring connections Trial for ignition Call for heat...
- Page 28 General troubleshooting PROBLEM PROBABLE CAUSE REMEDY Venter motor 1. No power to unit. 1. Turn on power, check supply fuses or circuit breaker. will not start 2. No power to venter motor. 2. Check connections at burner relay and/or venter motor terminals. 3.
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Page 29: Spare Parts List
12. SPARE PARTS 12. SPARE PARTS DESCRIPTION UESA-3 PART NUMBER LIST LIST Control relay 03 25324 Spark ignitor 05 25162 Flame sensor 03 401US 195292 Limit control LC3 all, exc. 055 03 24959 03 Limit control LC3 03 24959 Limit control LC1 03 24959 04 Pressure switch 30 60617 238... -
Page 30: Addendum : Technical Data
ADDENDUM : TECHNICAL DATA Country Gas category Country Gas category Belarus II2H3+ New Zealand II2H3+ CATEGORY Bulgaria I2H or I3B/P Norway II2H3 B/P China II2H3+ Poland II2E3P Czech Republic II2H3+ Portugal II2H3+ Croatia II2H3P Romania II2H3P Cyprus II2H3+ Russian Federation I2H or I3P Denmark II2H3 B/P... - Page 31 Nortek Global HVAC Belgium NV J&M Sabbestraat 130/A000 B-8930 Menen +32(0)56 52 95 11 www.reznor.eu 1612UESA-3/--EN, page 31/31...