SLIMKEEPER Horizontal Model “SLK” Guide Specifications PART 1 General 1.1 The HVAC system is based on Bulldog Heat Pump System 1.2 The system will automatically provide the availability of heating or cooling functions 24 hours a day, 365 days a year without need for a changeover 1.3 Model selection and performance shall be in accordance with the schedule on the drawings 1.4 Mechanical cooling shall be enabled with Entering Condenser Water below 125?F. The system is designed to operate on 2 GPM/ton. 1.5 Each unit/chassis shall be pressure tested with Nitrogen on both the refrigerant and fluid (water) circuits followed by a helium leak detection program for both circuits. Units are then attached to the vacuum system for at least 2 hours and monitored 1.6 Each unit shall be run tested for a minimum of 15 minutes with a water/ glycol solution to ensure 100% functionality in all modes of operation. Individual units/chassis shall be self-contained and complete when shipped from the factory 1.7 Units shall be safety certified and bear a seal of approval from one of UL/ULC/ETL or ESA. All units must be AHRI certified and meet ASHRAE 90.1 minimum standard 1.8 Manufacturer shall warrant the parts only of each unit for a period of 12 months from the start-up date or 18 months from the unit shipment date whichever occurs first 1.9 Commissioning of the Bulldog unit(s) shall be performed by a CGC trained technician. A commissioning report shall be provided by the commissioning technician for review and approval by the owner’s representative 1.10 It is the contractor’s responsibility to have the system properly flushed and cleaned prior to commissioning 1.11 Alternate proposals shall include consideration for equipment space requirements, pipe and equipment sizing, electrical installation impact, operation costs, sound implications and redesign fees PART 2 - Mechanical Parts 2.1 Housing 1. 2. 2.1. 2.1.1. The housing of the unit shall be constructed based on a frame and panel principle with removable panels for maximum service access. 2.1.2. The unit shall be fabricated with heavy gauge steel with all Interior of cabinet lined with 1/2” acoustic insulation 2.1.3. The supply air opening shall be complete with discharge duct collar. 2.1.4. The service panels shall be easily removable and sufficiently large to allow access to all components. 2.1.5. The unit shall be provided complete with hanging points and rubber isolation. 2.1.6. The unit shall be blow through design. 2.1.7. The cabinet shall be field convertible from straight through air return inlet to side air return configuration. 2.1.8. The plug connection shall provide positive disconnect of main power to the unit. 2.2 Blower and Motor 2.2.1. The complete blower section including motor shall be easily accessible and removable for service. 2.2.2. The blower shall be forward curved, DWDI centrifugal blower statically and dynamically balanced. 2.2.3. The blower is directly driven by an Electronically Commutated (EC) motor that has an integral thermal overload protection 2.2.4. The fan motor shall be totally enclosed air over type (TEAO) 2.3 Filter 2.3.1. The filter chamber shall be an integral part of the system located on return air path and should be serviceable from the front/ rear of the unit 2.3.2. The filter shall be standard capacity, 1 inch thick “Disposable” type shipped with the unit. *(OPTIONAL) MERV 8 filters *(OPTIONAL) Ducted Filter Box 2.4 Hydronic Heating Loop 2.4.1. The refrigerant circuit shall not operate in the heating mode 2.4.2. Heating coil shall be aluminum fin and copper tube construction rated to withstand 300 PSI working pressure *(OPTIONAL) The heating coil can be mounted in the reheat position for dehumidification – Humidistat by others *(OPTIONAL) For Cooling Only units, the heating coil can be omitted. This option provides a water-regulating valve. PART 3 - Refrigeration Parts 3.1 Refrigeration System 3.1.1. The refrigeration circuit shall be available for operation on non-ozone depleting R410a refrigerant. Refrigeration circuit does not operate in heating mode. Reversing type Heat Pumps must supply a life time Parts & Labour Warranty on the Reversing Valve 3.1.2. The refrigeration circuit shall have the following components: * Thermal Expansion Valve with external equalizer * Filter dryer * High pressure cut-out * High pressure service port * Low pressure cut-out * Low pressure service port *(OPTIONAL) Refrigerant Sight Glass 3.1.3. The service ports shall be located to facilitate field service with unit in place 3.1.4. All refrigerant piping shall be of type ACR copper pipe 3.1.5. The refrigerant circuit and components shall be factory assembled in a sealed, leak and performance tested, properly charged system 3.1.6. The sealed refrigerant circuit shall be certified for 600 PSIG working condensing pressure. 3.2 Compressor 3.2.1. The compressor shall be high efficiency sealed hermetic rotary 3.2.2. The compressor shall be externally isolated on rubber mounts and connected to refrigerant circuit with floating piping to minimize sound transmission 3.2.3. The compressor motor shall have integral thermal overload protection 3.2.4. The compressor shall not operate in the heating mode 3.2.5. The Compressor shall be provided with a 5 minute restart delay to avoid compressor short cycling and low pressure lockout. 3.3 Direct Expansion Evaporator Coil 3.3.1. The refrigerant to air heat exchanger shall be aluminum fin and copper tube construction rated to withstand 470 PSI refrigerant working pressure 3.3.2. The coil shall have a maximum face velocity of 500 FPM 3.3.3. A Stainless Steel insulated condensate drain pan shall be provided under the coil 3.3.4. Condensate hose extends outside of the unit near supply and return. No trap required since this section is under positive pressure 3.4 Water Cooled Condenser Module 3.4.1. The condenser shall be high efficiency refrigerant-to-water heat exchanger of copper inner water tube, minimum ½ “ diameter and steel refrigerant outer shell design rated to withstand 600 PSI refrigerant working pressure and 300 PSI water pressure 3.4.2. The connections shall be female pipe thread mounted flush to the cabinet exterior *(OPTIONAL) Stainless steel braided flexible Supply/ Return 24” hoses are available upon request 3.5 Valve Configuration – Factory installed All Units shall be supplied with a 3 way Valve for continuous flow. *(OPTIONAL) For variable volume pumping systems, all units shall be supplied with a flow limiting device and two 2 way control valves (1 for Heating and 1 for Cooling) PART 4 - Control Systems 4.1 System 4.1.1. The unit shall be complete with a standard microprocessor controlled electronic circuit board 4.1.2. The Control panel shall be supplied with individual 24 VAC control transformer 4.1.3. The control board shall have LED indicators displaying thermostat call, unit operation and Alarms 4.1.4. The control board shall operate with: * A 24 volt thermostat * Onboard fuse protection *(OPTIONAL) 3rd party controllers supplied by others can be installed and wired in a box outside the unit. This may change the unit’s overall dimensions *(OPTIONAL) A remote alarm contact available for connection to alarm monitor by others – Monitored and wired by others. *(OPTIONAL) BMS override function available to disable compressor only or disable unit. BMS override and wiring by others *(OPTIONAL) Condensate High Level Monitor and alarm is available *(OPTIONAL) Different types of Bulldog thermostats are available upon request 4.2 Alarms The standard Control Panel shall have the following standard alarms: * Low Coil Temperature * High Leaving Water Temperature * Low Discharge Air Temperature * Low Refrigerant Pressure * High Refrigerant Pressure * High Condensate Level (Sensor OPTIONAL) SlimKeeper Horizontal (SLK) - Guide Specification – BULLDOG Heat Pump Guide Specification is Subject to Change without Notice- (REV: April 2020) 3